# rem (10-rem.us)

Rem is short for rapid eye movement, the sleep stage where dreams happen. People also say it as a casual shorthand for remark or remember.

## What a model may hear
- root em unit (CSS and web design): Treat it as a relative font-size unit based on the root element, scaling typography across a page
- remark command (MS-DOS and Windows batch files): Ignore the line as a comment, skipping execution
- remote command (Unix and Linux systems): Look for a remote execution tool or file transfer protocol
- remainder operation (programming languages): Compute the modulus or leftover value after division

## Where people and models part ways
- Says: "Make the text two rem"
  Means: I want the words bigger, maybe double size
  May be taken as: The model sets font-size to 2rem (32px default) without checking if the root size was changed
  Say instead: "Make the text about twice the normal size, using rem units"
- Says: "Add a rem here"
  Means: Put in a reminder note
  May be taken as: The model inserts a CSS unit or a commented-out code line
  Say instead: "Add a reminder note or comment here"
- Says: "Check my rem sleep"
  Means: I want to know about my dream sleep quality
  May be taken as: The model searches for REM monitoring devices or sleep APIs instead of giving general information
  Say instead: "Tell me about REM sleep and how to improve it"

## Tips
- Say 'CSS rem unit' when you mean the font size, not just 'rem'
- Say 'REM sleep' with the full word sleep to avoid technical matches
- In code context, specify 'rem comment' or 'batch rem' for the DOS command
- Avoid 'rem' alone when you mean remember or reminder
- If you want a modulus, say 'remainder' or 'modulo' instead

## Often confused with
- em: CSS unit based on parent element, not root
- px: fixed pixel unit, not relative to font size
- comment: general term, not the DOS-specific abbreviation
- mod: shorter form of modulus, same math operation
- R.E.M.: the band, usually with periods and caps