Another essential item, similar to the mouse in that at one time they all used to be PS2 interface but now seem to be universally USB. One problem to be aware of when using a USB mouse that you may run into is the fact that some manufactures provide a somewhat non-standard way of using USB supporting mice and keyboards which can lead to some problems depending on how you use the system
Make sure that USB support for mice and keyboards is set up in the Bios of the motherboard. You may also find that although you enable it the keyboard has to be connected to a certain USB port. It may not be mentioned in the motherboard and I found it by trial and error. I had set up a dual booting system (something that’s explained later) when the system boots up you have the option of selecting between two different options via the keyboard but it was before the USB drivers had loaded on the system, so the keyboard wouldn’t work at that time! The keyboard sprang into life a few seconds after but by that time it was too late! Although USB keyboard had been set in the Bios which was supposed to sort out this problem it only worked for USB port 1. Once I had connected the Keyboard to this socket it worked as soon as the computer came on but it wasn’t mentioned in the motherboard manual it was only when searching the internet for an answer and then trying different USB ports that I sorted it out. Worth bearing in mind if you encounter this problem.
Keyboards come in many shapes and sizes and with lots of extra buttons should you require them. Windows buttons and menu buttons are quite common as are the function buttons for media and volume and such like. Once you get used to them it’s hard to live without them. I got used to a keyboard with a sleep button but when using another without it I felt lost! My favourite keyboard at the moment is a Logitech, wireless like the mouse, I’m not sure I could put up with wires again!