A desktop that takes up little space is available as an accessory in the Rakks shelving system. It's called the Cardan Work Surface and it is mounted on the Rakks shelving standards. It can be stowed away by folding up against the wall and be pulled down only when you need it.
It saves floor area for those who have light home office needs. Plus, you can add a lamp bracket to the Rakks system that holds most standard, bracket-mount drafting lamps.