Looking at the number of issues regarding the original 83-key XT keyboard, you can see that it's a pretty long list. Of course, in the early 1980s you didn't really have a lot of options. :^) Still, over time, IBM received a lot of complaints about the first keyboard design and eventually made improvements to it. The first evolution of the keyboard was the 84-key keyboard layout introduced with the first IBM PC/AT. Unsurprisingly, this is sometimes called the AT Keyboard