Mouse.

We had the keyboard discussed now let us see the mouse. Mouse can be classified based on a few ways.

Connectivity.

Mouse can be connected to a PC using either COM (Serial), PS2, USB, Bluetooth, Infrared, Wireless. The famous ones are USB, as they are cheap and affordable. For me anything that is equivalent to a lunch cost is affordable. I have seen some Mouse which are priced $50 and above. Sheer waste of money, unless your application genuinely needs that dpi.

Keys.

Mouse can have anything from 1 key to 10 keys. One to four mouse wheels. But to be useful to 90% of the productive community worldwide the two button + one wheel is good enough, unless you are of the Apple type.

Size and Color.

Mouse use to come roughly the size of a squeezed tennis ball. With white as the only color. But today I have seen mouse the size of a small lemon to the large ones as big as a PDA. In fact they look more like a cat than a mouse. There are all colors and designs. It is a fashion statement.

Technology.

Mouse can be wheel type or laser type. The wheel type  were prevalent a lot during older days (a decade back). During my teaching days that time, a regular topic discussed in the meeting was how to save the mouse balls. :) The laser mouse is simple, efficient, accurate, and solved our meeting problem.

But then mouse was invented in 1968 by Douglas Engelbart at the Stanford Research Institute

So are you old or is the mouse older. For me I was born after the mouse was invented.