If you want completely separate halves, with the 104/105-key formats the right-hand part would be much larger than the left-hand part, which is inconvenient whe

If you want completely separate halves, with the 104/105-key formats the right-hand part would be much larger than the left-hand part, which is inconvenient when you want to move or transport it. You can achieve the same effect in a more convenient way by buying any of the many keyboards with separate parts for the hands, together with a separate numeric pad, which contains the third part of a classic 104/105-key keyboard. The only remaining difference from the classic format is that on such keyboards the home-end and PgUp-PgDn key pairs are typically on the same vertical column at the right edge of the keyboard, instead of being side-by-side, but it is easy to become accustomed to this arrangement, which actually makes them easier to reach.