When taking notes in a lecture, for example, you cannot note down every single word. You tend to write in bullet points using abbreviations. What do you think these abbreviations mean? ∵ ∴ + & ? > < # $ ∆ / ↑ ↓ → ↔ = X etc. at al. eg. i.e. p./pp. ca. w/o cf. asap wrt