Why are there different signs for 'computer'?
Because computer technology evolved so rapidly, different Deaf communities developed their own signs simultaneously. The arm-tap version shown here, the forehead tap, and the two-handed circular motion are all widely recognized today.
Can I use this sign for a laptop?
Yes, this sign works as a general term for any computer. However, there is also a specific sign for 'laptop' where you use both hands to mimic opening a clamshell screen.
Does it matter which arm I tap?
Yes, you should always use your dominant hand to form the 'C' shape and do the tapping, while your non-dominant arm acts as the stationary base.