Mengenal Macam-Macam Topologi Jaringan Lengkap dengan pengertiannya – Sebenarnya informasi seputar topologi jaringan sudh banyak tersebar di  berbagai situs maupun blog. Topologi jaringan komputer ini memang banyak sekali yang mencari terutama bagi mereka yang sedang mengembangkan ilmu komputer atau IT. Informasi seputar macam-macam topologi jaringan pun bisa Anda dapatkan dengan mudah hanya dengan looking atau menjelajah ke berbagai situ, tidak terkecuali situs pintarkomputer.com yang dengan senang hati ikut membagikan beberapa informasi seputar macam-macam topologi jaringan komputer.

Sebelumnya juga kita sudah pernah membahas tentang manfaat jaringan komputer, Jenis jenis jaringan komputer, dan lain sebagainya. Pada artikel ini mari bersama-sama kita simak pembahasan tentang topologi jaringan komputer.

Sebelum melanjutkan ke factor utama, ada baiknya Anda mengetahui apa sih pengertian topologi jaringan komputer ataupun definisinya. Topologi jaringan merupakan sebuah desain jaringan komputer yang akan dibentuk serta menjelaskan bagaimana komputer-komputer tersebut dapat saling berhubungan antara satu sama lain. Topologi jaringan juga bisa memudahkan kita untuk memahami bagaimana jalur lalu lintas information yang terjadi pada sebuah sistem jaringan. Dengan begini, jika kita ingin melakukan perbaikan terhadap sebuah jaringan, kita tidak perlu lagi kebingungan untuk mulai memperbaikkinya dari mana. Karena topologi jaringan ini sudah menggambarkan sejelas-jelasnya bagaimana sistem jaringan tersebut terbentuk.

Macam Macam Topologi Jaringan Komputer

1. Topologi Bus



Topologi ini merupakan topologi yang paling awal digunakan untuk menghubungkan komputer. Media transmisi yang digunakan pada topologi ini hanya menggunakan satu kabel panjang dengan dilengkapi beberapa terminal, dan pada akhir kabel tersebut harus diakhiri oleh satu terminator. Kabel coaxial lah yang menjadi media transmisi pada topologi ini. Meskipun terlihat simple, namun topologi bus sudah sangat jarang digunakan dalam membangun sistem jaringan. Hal ini mungkin dikarenakan beberapa kekurangan yang diantaranya kemungkinan terjadinya tabrakan aliran data, dan juga jika pada salah satu perangkat terjadi keslahan maka jaringan tersebut langsung down.

2. Topolgi Ring / Cincin

Sesuai namanya, pada topologi ini setiap komputer yang yang tersusun berbentuk cincin atau ring. Data token diberikan untuk memberikan izinuntuk setiap komputer agar dapat berkomunikasi. Dimana setiap node yang tersusun berkomunikasi dengan formasi melingkar membentuk ring,. Dengan kata lain setiap komputer saling terhubung antar dua komputer lainnya.

3. Topolgi Star / Bintang

Pada topolgi ini, setiap komputer saling terhubung sedemkian rupa sehingga membentuk bintang, dimana setiap perangkat saling terhubung mengelilingi hub/switch sebagai consentrator nya. Topologi ini adalah yang paling sering digunakan pada jaringan LAN (local Area Network). Topologi ini sering digunakan di rumah, kantor, sekolah, lab komputer, dan lain sebagainya. semua komputer yang terhubung pada topologi megastar memerlukan hub, switch, ataupun router dengan media transmisinya adlah kabel UTP / STP.

4. Topologi Mesh / Jala

Pada topologi ini setiap komputer saling terhubung satu sama lain. Dengan kata lain setiap komputer dapat langsung berkomunikasi dengan komputer lainnya. Akibatnya, untuk menerapkan topologi ini, setiap komputer harus memiliki banyak interface agar bisa terhubung dengan komputer-komputer lain.

5. Topologi Tree / Pohon

Topolohi ini bisa juga disebut sebagai penggabungan dari topologi celebrity dan topologi bus. Topologi ini biasa juga disebut sebagai topologi bertingkat, dan sangat cocok untuk diterapkan di kantor-kantor yang bertingkat. Topologi jaringan komputer Type Tree ini paling ideal two digunakan pada sistem jaringan komputer. Pada jaringan Tree, terdapat beberapa tingkatan simpul atau node. Pusat atau simpul yang lebih tinggi tingkatannya, dapat mengontrol simpul dibawah tingktannya. Kombinasi topologi ini mendukung masa depan upgrade dari jaringan komputer, jauh lebih baik daripada bus atau star.



Mengenal Macam Topologi Jaringan Pada Komputer Lengkap Beserta Pengertiannya

7 Features You Must Have on Smartphones Nowadays, Do you have it?

We know that nowadays technological development, especially smartphones are very fast developing. Smartphone manufacturers are beginning to include a variety of interesting features that make smartphone functions more and more interesting. Even so, we have to be smart in choosing what features we really need in a smartphone.
Well, I will tell you what features need to be on Smartphones Nowadays. Interested to find out? Check out these 7 features! 

1. Face Unlock 

Face unlock is a security feature that must be present on today's smartphones. This feature allows the user to open the smartphone quickly using a user's face that has previously been scanned in the security settings. By using this feature, you will be able to unlock your screen faster without the hassle of entering your screen lock password so that you can use your smartphone effectively and efficiently. 

2. Fingerprint Scanner 

This feature allows users to unlock smartphones without having to enter a screen password. The difference is this security feature uses fingerprints in its use. To be able to use this feature you must first scan your fingerprint on the security settings. After the scanner has identified your fingerprint, you can use this feature to unlock the screen by placing your finger on the scanner. 

3. IR Blaster

IR blaster (Infra-red blaster) is a feature that you can use to control other electronic devices such as air conditioners and TV. In addition to controlling electronic devices, IR blaster is also used by some cellphone manufacturers for better facial recognition, so you can use face unlock in a dim state or even without light at all.

4. Fast Charging 

Fast charging is a feature that makes a smartphone with a large battery capacity able to charge batteries quickly. 

5. NFC 

NFC (Near Field Communication) is one of the features that smartphone manufacturers are beginning to present because of its diverse functions.
NFC can be used for various needs such as online payment, connecting to devices that support NFC, to sharing files instantly. Although the use of payment instruments using NFC is not very popular in Indonesia, someday NFC will become a practical payment tool, so consider buying a smartphone that already has NFC. 

6. USB Type C 

USB (Universal Serial Bus) Type C is a new standard in cable connectivity in the world of technology. This type of USB offers ease of use compared to the previous type of USB.
By using this type of USB you will no longer have the hassle of finding the right position to insert this USB into a port. In addition, USB type C designers have made a kind of "click" feature so that you are sure that this USB is installed properly.

7. Slot Micro SD 

For those of you who like to play games let alone collect lots of large size games, you also need to prepare an external storage such as a memory card.
So for you who will store a lot of data in your smartphone, you should look for a smartphone that has a micro SD slot so you can increase the storage capacity of your smartphone. 
That's 7 features that you need to be on Smartphones Nowadays. What other features do you think that should be possessed by smartphones nowadays?

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The Mobile Phones of Back Then VS Smartphones of Today























7 Features You Must Have on Smartphones Nowadays, Do you have it?

How to Repair Dell Laptop Keyboard Keys

Dell laptop computer keys are among the most irritating keys to work with. However, it is feasible to restore many troubles at home. Most professional repairs involve changing the entire keyboard, so it is worth taking a few minutes to perceive possible alternatives. If your laptop computer is nonetheless beneath warranty, contact Dell customer aid for a possible free or reduced fee repair.

Repairing a Loose Key
1
Turn off your computer. Unplug it as well. Repairing a keyboard is not dangerous, however it is constantly a proper concept to take these precautions before you repair a computer.


2
Remove the key cap. Most unfastened keys should come away easily, with some mild wiggling to unhook them from the conserving clip. If necessary, lever out the key cap from the corners with a flat head screwdriver.


3
Check the attachment points on the key. The base of the key cap ought to have up to four attachment points, where the key clips onto the keyboard below. Look closely for symptoms of a damaged attachment. Continue on to one of the steps under depending on what you see.
If you are now not sure, dispose of a purposeful key of the equal size by way of gently levering out each corner with a screwdriver. Compare the attachment factors on the two keys.
Replace a broken key cap. If the attachment factors are broken, you will need a new key. Purchase one online, making sure it fits your laptop computer mannequin and the area of the attachment points. To put in the new key, hook one attachment factor onto the keyboard, then rub your finger over the key till you hear two loud snaps, one at each end of the key.
Alternatively, get rid of a key of the identical measurement that you hardly ever use. Place it in the former key's position.

5
Fix the steel bar on massive keys. The space bar and ⇧ Shiftkeys are held flat by way of a steel bar. If this bar is not flat, you may need to re-attach it to the small plastic hooks on the keyboard. The bar ought to run along the lower stop of the key, with the brief hands of the bar strolling up the left and proper facets and onto the hooks. Once the bar is reattached, press the key cap over it and test it.
Once the bar is out of place, it often continues to have minor troubles or gets a tendency to slip out of area again. Consider buying a substitute keyboard for your laptop, or having it repaired at a pc restore store.
If you are installing a alternative for one of these keys, the alternative will come with its own bar. Remove the old bar first by using gently levering it upward with a flat screwdriver.


6
Check for different problems. Loose keys are nearly constantly triggered through harm to the key cap itself, or the metallic bar of large keys. If you are sure the key cap is in properly condition, study the area on stuck keys below. This covers harm due to spills, broken conserving clips, or a broken membrane.

Repairing a Stuck or Nonfunctional Key

1
Turn off and unplug your computer. This reduces the threat of injury to you and your computer

2
Lever out the key with a screwdriver. Remove the stuck key with a small, flat head screwdriver. Start via lifting each corner of the key, listening and feeling for a snap as it unhooks. Repeat with every corner until the key is removed, after two to 4 snaps.[2]
Use light strain only. If the key doesn't pop out, strive a exclusive corner.
To remove larger keys, such as the Shift key and Space bar, lever from the pinnacle of the key (the facet nearest the laptop screen).

3
Look for filth or small objects. These can purpose the key to stick. Remove small objects with a pair of tweezers. Remove unfastened dust or animal fur with compressed air or a gentle vacuum cleaner hose attachment.

4
Clean up spills. If you've got spilled substances on the keyboard, eliminate the residue with a lint-free cloth. Dampen the cloth with a small quantity of rubbing alcohol and wipe the sticky region gently. Leave the key cap off until the rubbing alcohol has totally evaporated and the place is dry.

5
Examine the keeping clip. The keeping clip, most frequently made out of white plastic, consists of two thin, square objects hooked round each other. These should be firmly connected to the keyboard, and to each other. If they are not, eliminate the clip by using gently twisting the corners free with a screwdriver. See under for certain directions on replacing them.

6
Check the silicone rubber membrane. This nipple-shaped membrane sits beneath the middle of the key. Confirm that it is standing up, and try to depress it with a very mild contact from a clean, tender object. If it sticks in the down role rather of popping returned up, it wants cleaning or replacement.
Do not contact it with a dirty or sharp object. This part of the keyboard is effortlessly damaged.
Clean with a lint-free material dampened slightly with rubbing alcohol. Pat with extreme care and wait for it to dry.

1. 7
Glue down a new membrane. Before you begin, realise that this is a risky fix, and could smash the key if you use too much glue. For a more reliable repair, take the keyboard to a computer repair expert to change the whole keyboard. If you do figure out to attempt this yourself, do so as follows:
Very carefully do away with a membrane from a key you don't use through levering it off with a sharp knife.[3] It is very easy to injury the membrane this way, but this is usually your only source of substitute membranes.
Use a toothpick to place a dab of strong glue, such as silicone adhesive, onto a sheet of paper.
Pick up the membrane with tweezers and decrease it onto the sheet of paper, then transfer it onto the keyboard.
Let sit for at least 30 minutes, or according to adhesive label instructions.
Reattach the retainer and key cap on pinnacle of this, and let take a seat some other 20 minutes earlier than using.



Dell Llaptop Computer How to Repair Dell Laptop Keyboard Keys

5 Common Laptop Problems and How to Repair Them

A large chunk of the corporate world is mobile, and they need computing power that can accommodate that. Over the years laptops have long gone from cumbersome and heavy to slim and lightweight. But, even with all the improvements in power, size, capacity and memory, laptop computer problems nonetheless occur fantastically regularly. Here is a quick list of 5 of the most frequent issues we hear about and how you can address them on your own.

Problem: Loud fan or heating up accompanied by means of shut down. Laptops get moved around a lot. This can lead to limiting air consumption to the fan. It additionally gives them lots of possibilities to drag dust and overseas particles into their cooling device via their fan portal.

Solution: Use your laptop computer on hard, flat surfaces; Avoid putting it on soft surfaces that can also block air passage. Clean out your fan with compressed air. Limit how many applications you run at once as properly due to the fact the extra you have running, the tougher it has to work.
Problem: Laptop jogging slowly. This happens pretty often and may want to be related to hard force space, malware or the first symptoms of gear failure.

Solution: There are lots of approaches to attempt to address speed issues, however check out our blog post committed to simply this subject matter for 10 pointers on speeding up your machine.
Problem: Battery doesn’t last. One of the high-quality points of a laptop computer is that it’s wireless. But, we stay in constant concern of draining our battery and walking out of juice, so we are continuously hard on our battery.

Solution: First, check all of your charger cable connections to be positive they are snug. Next, drain your battery definitely and recharge it by leaving your laptop computer on until it dies. One of the biggest fixes of all technological know-how is in reality to utterly drain the power from it and attempt again, the laptop equal of a desirable night’s sleep. If it nonetheless fails some distance faster than it should, you might also need to change the battery itself.

Problem: No internet. Laptops are infamous for dropping connection to the internet, which can be a most important hassle. Before assuming some kind of gear failure, strive some fundamental steps.
Solution: On most laptops, there is an true wi-fi button or switch to activate the connection, discover it and make sure it’s in the ON position. Then re-boot your router, once more the use of the drain the electricity tactic; unplug your router, let all the juice drain out for 10-20 seconds, then plug it returned in. If you’re still having trouble, troubleshoot your network connections in your manage panel. Finally, re-build your community from the opening to make sure all your connections are set up properly.

Black Screen. two You open up your laptop, strength it on, hear it running, but the display is black.
Solution: Unplug the power, take away the battery and then preserve the electricity button for 30 to 60 seconds. Reattach the strength cord and re-boot. Then shut down again, put in the battery and re-boot.

If you attempt any of these home made fixes and are nevertheless experiencing the same problem, it’s time to convey in a laptop computer restore professional. The engineers at Great Lakes Computer are professionals in computer, printer, server, and point-of-sale repair and maintenance. We offer various levels of service as well, from hourly to contract maintenance. Contact us today to get your laptop troubles fixed and your laptop lower back on its feet. 

5 Common Laptop Problems and How to Repair Problems and Solutions

How to resolve Computer or Laptop Overheating?

How to fix overheating laptop ?? Laptop too hot ?
A broken fan can purpose your computer to overheat and damage inner components like the CPU, video card, challenging drive and motherboard. Computer fans commonly adjust their pace depending on the heat being generated by way of the computer. For example, if you're using your pc to render video, the laptop is most probable producing a lot of heat, causing the fan to pace up to displace the hot air. If your computer's fan isn't always working, the warm air might also have nowhere to go.

1. Look and Listen

The quickest way to inform if your computer's fan has stopped working is to visually inspect it. If it's a computer computer, you can typically see the fan rotating on the again of the case. If the fan is now not moving, you must substitute it immediately, before the use of your laptop further. Although most more moderen pc followers are very quiet, you ought to be in a position to hear it moving, particularly when walking at high speeds. A fan that sounds strangely loud or is making unusual noises probably needs to be replaced. When in doubt, put your hand over the air vents on your laptop and sense if there is air moving out of the computer.

2. Check for Symptoms

Most CPUs have built-in thermal protection that shuts the computer down if it gets too hot. If you observe your computer continuously shutting down or no longer booting up correctly, it may additionally be an indication of a damaged case or CPU fan. To prevent permanent harm to your computer's interior factors you should have the fan replaced immediately. Check the fan on the computer's case and, if possible, open the computer case to make certain the CPU fan is running correctly. In a desktop computer, each followers are inexpensive to replace and can be located at your nearby pc restore store or on line retailer.

3. Check the Temperature

If you can not visually investigate the fan you have to check the temperature of your CPU. Restart your computer and enter the BIOS settings through pressing the corresponding button proven on your display screen for the duration of begin up. You'll commonly find a menu option as soon as inside the BIOS that displays the temperature of the CPU. The maximum temperature for most processors is 80 degrees celsius, so any readings  be well under this number. If the temperature of your CPU is at or above eighty degrees, have someone look at the fans to see if they need to be changed and turn the laptop off to forestall damage.

4. Keep Things Clean

You can prolong the existence of your computer's fan through keeping it smooth of filth and debris. Wipe away any dirt discovered on the outside of your laptop with a cloth, and use a compressed-air canister to do away with any dirt or dirt that may want to be clogging the fan and stopping it from rotating. For laptop computers, open the case and make certain no dust is preventing the CPU fan from working correctly. You can use compressed air to blow away any dust that is observed inside the computer, and a material to wipe down the interior of the case. Try not to touch any factors without delay besides the use of a grounding strap. 

How to resolve Computer or Laptop Overheating? If your computer's fan isn't always working ?

What is a computer? What are functions of a computer?
In today’s world computers has become necessity for everyone. It gives an important rich source of information for the people all over the world. It has become mandatory for everyone to know about the computers. Through the computers you can see the world. It is an electronic device which accepts the input data, processes the data and finally gives the output in a required format.

The main purpose of this tutorial is to introduce you to Computers and its fundamentals.

Functionalities of a Computer
Coming to the functionalities of a computer with a very broad sense, any digital computer carries out the following five functions −

Step 1 − Takes data as an input.
Step 2 − Stores or saves the data/instructions in its memory and uses them as an when required.
Step 3 − Processes the data and converts it into useful information.
Step 4 − Generates the output.
Step 5 − Controls all the above four steps.


Advantages of Computers

What are the advantages and disadvantages of a computer?
Following are the advantages of computers.

High Speed

Computer is a very fast device with its high speed.
It can perform calculations of very large amount of data.
The computer has its units of speed calculated in microsecond, nanosecond, and even the picosecond.
Computers are bound to perform any number of calculations within few seconds as compared to man because man cannot perform the same task within seconds.

Accuracy

Being very fast, computers are very accurate in their task.
The calculations that are performed by the computers are 100% error free.
Computers perform all jobs with 100% accuracy with the correct input that user has given.

Storage Capability

Computers have much storage capacity in the form of memory. Memory is a very important characteristic of computers.
A computer has much more storage capacity than human beings.
It can store large amount of data and perform calculations.
Any type of data can be stored in its memory such as images, videos, text, audio, etc.

Diligence

Unlike human beings, a computer is free from monotony, tiredness, and lack of concentration.
It can work rigorously without any error and boredom while man cannot.
The same task is performed repeatedly with the same speed and accuracy.
Versatility

A computer is a very versatile machine.

A computer remains flexible in performing the tasks to be done.
This machine helps to solve the problems pertaining to different fields.
It has the capacity to perform dual role, means for example, it may be solving a complex scientific problem and the very next moment it may be playing a card game.
Reliability

A computer is a reliable machine.

Modern electronic components or devices have long lives.
Computers are specially designed to make maintenance easy and error free.
Automation

Computer is an automatic machine.

Automation is the process of performing a given task automatically. Once the computer receives a program from the user as an input, the program then is stored in the computer memory, gives the instructions the memory and finally results in program execution without human interaction.

Reduction in Paper Work and Cost

This is very helpful in organizations where a lot of paper work can be reduced with the use of computers for data processing. This results in speeding up the process.
Where the data is stored in the computers, you can retrieve the data as and when required. This reduces the problem of maintenance of large number of paper files.
Initially the investment for installing a computer is very high, but it substantially reduces the cost of each of its transaction.

Disadvantages of Computers

Following are certain disadvantages of computers.
No I.Q.
A computer is only a machine, it cannot perform tasks on its own. It has artificial intelligence.
Each and every instruction has to be given by the user to the computer.
A computer cannot take any decision on its own.

Dependency

Regarding its dependency, it depends totally on human instructions given in the form of input.

Environment

The environment of the computer where the operations are performed should be dust free and suitable.

No Feeling

Computers have no feelings or emotions as it is not human being. It is an electronic device which is used to perform specific tasks.
Unlike humans it cannot make judgment based on feeling, taste, experience, and knowledge.

What is a computer? What are functions of a computer? COMPUTER OVERVIEW - COMPUTER FUNDAMENTALS


A computer is a programmable device that can store, retrieve, and process data. The term "computer" was originally given to humans (human computers) who performed numerical calculations using mechanical calculators, such as the abacus and slide rule. The term was later given to a mechanical device as they began replacing the human computers. Today's computers are electronic devices that accept data (input), process that data, produce output, and store (storage) the results.

Page Content

1.Computer overview.
2.History of the computer.
3.How are computers used today?
4.What components make up a desktop computer?
5.What parts are needed for a computer to work?
6.Computer connections
7.Types of computers.
8.Who makes computers?
9.Related computer pages.


All computer questions and answers.

Computer overview

Below is a picture of a computer with each of the main components. In the picture, you can see the desktop computer, flat-panel display, speakers, keyboard, and mouse. We've also labeled each of the input devices and output devices.


Tip

You can find further information about other types of computers and get a breakdown of the components that make up a desktop computer later in this document.

History of the computer
The first digital computer and what most people think of as a computer was called the ENIAC. It was built during World War II (1943-1946) and was designed to help automate the calculations being done by human computers. By doing these calculations on a computer, they could achieve results much faster and with fewer errors.


Early computers like the ENIAC used vacuum tubes and were large (sometimes room size) and only found in businesses, Universities, or governments. Later, computers began utilizing transistors as well as smaller and cheaper parts that allowed the ordinary person to own a computer.

How are computers used today?

Today, computers make jobs that used to be complicated much simpler. For example, you can write a letter in a word processor, edit it anytime, spell check, print copies, and send it to someone across the world in a matter of seconds. All these activities would have taken someone days, if not months, to do before. Also, these examples are a small fraction of what computers can do.

What components make up a desktop computer?

Today's desktop computers have some or all of the below components (hardware) and peripherals. As technology advances, older technologies, such as a floppy disk drive and Zip drive (both shown below), are no longer required or included.

Bay
Case or Chassis
Case Fan
Optical drive: Blu-ray, CD-ROM, CD-R, CD-RW, or DVD.
CPU (processor)
Floppy disk drive
Hard drive
Keyboard
RAM (random access memory)
Microphone
Monitor, LCD, or another display device.
Motherboard
Mouse
Network card
Power Supply
Printer
Sound card
Speakers
Video card

Wearable

What parts are needed for a computer to work?
A computer does not require all the components mentioned above. However, a computer cannot function without having at the very minimum the below parts.

Processor - Component that executes instructions from the software and hardware.

Memory - Temporary primary storage for data traveling between the storage and CPU.

Motherboard (with onboard video) - Component that connects all components.

Storage device (e.g., hard drive) - Slower secondary storage that permanently stores data.


However, if you had a computer with only the above minimum parts, you would be unable to communicate with it until you connected at least one input device (e.g., keyboard). Also, for you to see what is happening, you would need at least one output device (e.g., monitor).

Tip

Once a computer is set up, running, and connected to a network, you could disconnect the keyboard and monitor and remotely connect. In fact, this is how most servers and computers in data centers are used.

Computer connections
All computers have different types of connections. However, an example of the back of a personal computer and a brief description of each of the connections is found on our computer connections page.


How do I set up a new computer?

Types of computers
When talking about a computer or a "PC," you are usually referring to a desktop computer that you would find in a home or office. Today, however, the lines of what makes a computer are blurring. Below are all the different examples of what is considered a computer today.

Above, is a visual example of a few of the most popular computers and an example of their differences. Below is a complete list of computers of past and present.

Console (e.g., Xbox and PS3)
Desktop computer
Diskless workstation and Thin client
Embedded computers - The most common and used computer. An embedded computer is a computer with a specific function found in such things as ATMs, cars, microwaves, TVs, the VCR, and other home electronics.
Hybrid computer
Laptop, portable, notebook computer
Mainframe or Supercomputer
Microcomputer
Nanocomputer
Netbook
PDA
Personal computer (aka desktop and home computer)
Server
Set-top box
Smartphone

Tablet

Who makes computers?
Today, there are two types of computers the PC (IBM compatible) and Apple Mac. There are dozens of companies that make and build PCs, and if you get all the necessary parts for a computer, you can even build a custom PC. However, when it comes to Apple, only Apple designs and makes these computers. See our computer companies page for a listing of companies (OEMs) that make and build computers.

Desktop computer buying tips.

Mac vs. PC.



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Answer What is a Computer (components ,connections,computers,History)

Postingan Lama Beranda