# exo (1-exo.org)

An exo is something outside or external. People say "exo" to talk about outer layers, outside parts, or things that come from beyond a boundary. It is also a prefix in everyday words like "exoskeleton" or "exosphere."

## What a model may hear
- exoplanet astronomy (astrophysics and space science): may assume the user wants data about planets outside our solar system, orbital parameters, or telescope observations
- exocentric construction (linguistics and grammar): may analyze the word as a technical term for phrases where the whole has a different category than its parts
- EXO file format (Android video streaming): may assume the user refers to chunked video files used by YouTube and other apps for DASH streaming
- exo- prefix in chemistry (organic chemistry): may interpret as a stereochemical descriptor for substituents outside a ring system, as in exo versus endo
- EXO in gaming (video games, especially Astroneer): may assume the user refers to in-game factions, missions, or equipment from that specific game world

## Where people and models part ways
- Says: "Tell me about exo life"
  Means: The user wants to know about life on exoplanets or alien biology in general
  May be taken as: The model may focus on technical exoplanet detection methods, habitable zone calculations, or specific telescope datasets rather than the biology question
  Say instead: "Tell me about possible alien life on planets outside our solar system"
- Says: "How do I open an exo file"
  Means: The user has a file with .exo extension and wants to play or convert it
  May be taken as: The model may explain chemistry stereochemistry or linguistic constructions instead of video file handling
  Say instead: "How do I play or convert a .exo video chunk file from Android streaming"
- Says: "Exo structure"
  Means: The user wants to know about external skeletons in animals
  May be taken as: The model may discuss exocentric linguistic structures, exoplanet atmospheric models, or game building mechanics
  Say instead: "Exoskeleton structure in insects and animals"
- Says: "Exo vs endo"
  Means: The user wants a general comparison of outside versus inside
  May be taken as: The model may dive into organic chemistry stereochemistry specifics or Diels-Alder reaction mechanisms
  Say instead: "Compare exo- and endo- as prefixes meaning outside versus inside"

## Tips
- Add "planet" or "skeleton" or "file" right after "exo" to steer the model
- Say "the prefix exo-" when you mean the general meaning, not a proper noun
- Use "exoplanet" in full; "exo" alone drifts to technical astronomy shorthand
- For video files, say ".exo extension" to signal file format, not chemistry
- In chemistry contexts, say "exo product" or "exo stereochemistry" to be specific

## Often confused with
- exo-: the prefix with hyphen, versus the standalone word
- exoplanet: the full astronomical term, not the clipped form
- exoergic: energy-releasing nuclear or chemical process, not spatial outside
- exome: the expressed part of a genome, not external structure
- exo-mars: a specific ESA mission, not the general prefix
- exo player: Google's ExoPlayer library for Android media, not the file format itself