It is the easiest way to do it reliably: on/off signals are easier to distinguish than more levels.
Note: there were a few computers built in the USSR that used ternary numbers instead of binary (e.g. + voltage, 0 voltage, - voltage). They worked but the circuits to identify the 3 levels were much more complex than for 2 levels.
binary
It stores information.
Three types? Where did you hear this from? There is only one way RAM stores data. Data is not a type. RAM stores information in binary form. There are microscopic capacitors in the RAM chips which either store a charge (on, 1) or have no charge (off, 0). But RAM can hold all kinds of information that a computer uses. It can hold CPU instructions, hard disk information, graphics data, text, numbers, decimals, etc.
A computer network stores information on what computers can connect and what information is shared and to what system. Your brain stores who you interact with, who your friends are, and who you share secrets with.
Computer memory stores whatever data you enter into your computer. This is something like asking, what information is written on paper. The answer would be, any information that you choose to write. There are types of information, such as videos, that can be stored in computer memories, that cannot be written on paper. Computers are very versatile. They can store numbers, words, pictures, moving pictures, and sounds, as well as programs (which ultimately are in the form of a series of numbers) that instruct them in how to do what you want them to do.
Micro Center computer stores has a web site that provides information on various computer products. Information about ASUS monitors is available on the site or through their stores.
As coded numbers, just like it stores anything else.
server
Because it stores information using two digits, 1 and 0, and bi- means two.
The drive where your computer stores information permanently is known as a hard disk drive, or HDD for short.
A bar code consists of lines, or bars, if you will, that contain numbers and code for a product. It hold the information for the pricing, the inventory and the SKU numbers or catalog numbers of a certain product. It is also integrated in stores computer system.
Any local computer store would have information on the memory ram of a computer. The employees of these computer stores are professionals and the information that they provide would be ideal.