ZAK's Data Lab

The Paper 1 calculations that lose the most marks, laid out so you can copy the working: file sizes in the right units (1024 or 1000 — the syllabus cares), run-length encoding you can watch happen on a pixel grid, what a lossy slider actually throws away, the binary behind a character, a pixel and a sample, and for A2 the three ways a file can be organised. Binary arithmetic and shifts live in the Number Systems Lab.