Crash Course Computer Science is available to stream on ... There are many variants of the abacus, but let's look at a really basic version with each row representing a different power of ten.

Crash Course Computer Science is available to stream on ... This might seem obvious, but you'd be amazed at how many interfaces get basic things like this wrong. Beyond visual perception ...

basic specifications and any software or hardware you’ve added. Keep backup discs, systems discs and software that came with the computer. Also be prepared to tell the technical support ...