I'm trying to connect my PS/2 keyboard to the Raspberry Pi Model B. So I went out and bought myself a PS/2 to USB adapter hoping that it would work.
Here's an image of the adapter below:
And here is a picture of the keyboard I'm using:
It's an IBM Keyboard Model KB-7953 With 5v and 200mA.
Comment if there is any more information you need to know to see what the problem is.