Round Numbers
256 days since I quit smoking. Yeah, I'm a programmer. Sue me. [Scripting News]
For non-programmers, 256 happens to be two raised to the power of eight, which is the number of distinct bytes that exist (a byte is eight bits, which is either a one or a zero).
Incoming computer science students no longer know their powers of two. Even most of my contemporary grad students don't know their powers of two. Those of us who instantly know 32,768 is 215 are a dying breed. Heck, most grad students don't even seem to know the 210 =~ 103 (where =~ means "approximentally equal)... I see something like 255 and I know quite quickly that is approximentally 32 quadrillion, close enough for government work.