How do I fill in these boxes?...

Computer Model and Make:
The make of your computer is whoever assembled your computer; common makes are Dell,Compaq, Acer, HP, and others.
Operating System:
If you are using Windows, you will know what operating system you are using because its logo is displayed as your system is starting up. The specific version number information is not crucial but service packs versions are crucial.
In Windows Operating Systems you can find this information at:

(Windows9x / ME): Start > Settings > Control Panel > System
(Windows XP): Start > Control Panel >System
(Windows Vista): Start > Control Panel > System
(Windows 7 & 8): Start > Control Panel > System
and reading off the value listed underneath your Operating System name.
Service Pack:
On a Windows system you can click:
Start > My Computer > and then click on "View system information" (upper left corner of screen). The Service Pack number is shown on the "General" tab.
This is harder to find. On a Windows system you can click:
Start > Run and then type msinfo32In the box and pressing OK.
You will be rewarded with a list (System Information) of most every item of your system. For instance under Processor you can find things like; Pentium or AMD Athlon, or sometimes AMD Thunderbird, Duron, K6 / K7 and Intel Celeron processors. The speed of the processor is listed in MHz (or if you have more than 1000MHz, in GHz).
Memory (RAM):
Listed in Megabytes< or Gigabytes, you should be able to find this listed under the Total Physical Memory section of System Information. If it is listed in kilobytes (not megabytes), divide the valueby 1024 to convert to MB. Common values are 128 MB, 512 MB MB, 1GB etc. in multiples of the next lower value.
Web Browser:
Please list the most common WebBrowser that you use. It may be Internet Explorer, Netscape, Opera, FireFox, Mozilla, Safari, or others. You can usually find the version by clicking Help > About... in the program's menu bar. Since browsers vary a great deal between versions we MUST have the version number.
Screen Resolution:
In most cases this is not crucial information. But can sometimes be useful. It is essential for Video(Picture) problemsIn Windows Operating Systems you can find this information at:
(Windows9x / ME): Start > Settings > Control Panel > Settings
(Windows XP): Start > Control Panel > Settings
(Windows Vista) Start > Control Panel > Display > Adjust Resolution
(Windows 7 & 8) Start > Control Panel > Display > Adjust Resolution
Record the value of the Screen Area. The first figure is the number of horizontal pixels and the second figure is the vertical pixels. Normal values are 640 x 480, 800 x 600,1024 x 768 and others.

Linux Users
As a Linux user you have the choice of how to extract system information. You can use a graphical user interface (GUI) which is basically through the menu system on your desktop or you can use the command line. The command line tends to terrify people, a bit of a curiosity that, but it is often the best approach. The following instructions set out how to find information using both approaches.
Computer Model and Make:
For the computer make and model, Linux cannot help you. Just look at the label on the computer itself or on your user manual, the information is there. The reason is that most computer companies do not actually make computers, they assemble parts made by other companies and then call it a computer. Linux looks and tells you what those parts are. This information is helpful to use since we can then take a look at what is the standard hardware specification.
For general system information go to System / Administration / System Monitor Click on the first tab (labelled System. Listed there will be the version of the operating system, kernel and desktop. Also the information for processor, memory and free disk space will be found.
To find out which browser is being used go to System / Preferences / Preferred Applications and the default browser is listed. The version will always be the latest if the client is keeping his machine connected to the Internet (Firefox is automated update) or running system update (which may also be partially automated). To confirm the version, the easy way is to open the browser and go to the Help / About menu where the details are described.
Enter the following command with password when prompted:
sudo lshw
This will return a list of all installed hardware which will include things like motherboard through to say video card and data width.
The command
sudo lsb-release -a
will list the operating system version release information
Listing the browser informaton assumes that you know which browser you are using. Most people do know this. To find out the version, run the following command assumes that you are using firefox, the required information is in the first eight lines.
sudo dpkg -s firefox

Mac System Information
To get an overview of your system, click the Apple logo on the top left of the menu bar and then click "About This Mac". A window displays your processor and memory details, as well as the version of the Mac OS you are running. You can click the version number to have access to your Mac OS X build number or your computer's serial number.
When you click More Info, you will open an application known as System Profiler that provides in-depth information about your hardware, network, and software on your Mac. Anything you would ever want to know about components in your machine or software you have installed on your computer can be found here. The Graphics/Display category will tell you your screen resolution.
The System Profiler provides a wealth of information about the Mac. The System Profiler major headings include:
Hardware: This heading tells you volumes about your hard drives, as well as specifics concerning your CD and DVD drives, modem, AirPort and Bluetooth hardware, graphics hardware, AC power settings, and any FireWire and USB devices connected to your system. Figure 2 illustrates the information from a USB screen, with many of the devices expanded so that you can see them. (The text you see at the bottom half of the window is the detailed information on the item that's selected.)
Network: This heading shows a listing of your network configuration, active network connections, and other network information.
Software: This screen lists all the applications, fonts, and preferences recognized on your start-up volume, along with their version numbers. If you need to update an application with a patch file (to fix bugs in the software) or update a file from the developer, you can look here to check the current version number for the application. You also have access to extensions (or drivers) used by Mac OS X applications. Logs document recent lockups, application crashes, and even system crashes. Then you can click FILE--> SAVE AS in the System Profiler.