S
Script
A short list of instructions, often one file. hello.py. You run it with a command.
Decoder ring
Four words that keep overlapping.
Use this page when a lesson says program and you hear app, or when someone calls hello.py an app and it feels wrong.
P
Program
The broader word. A script is a kind of program. An app is also a kind of program.
A
App
A program with screens you tap. Icon. Buttons. WhatsApp energy, even when the app is tiny.
K
APK
The install package for an app. The boxed product. Not the running guest itself.
Same idea on the Android floor
The Android wing explains how those shapes sit on the phone. This page is only the names.
Next step
A few leftover words, then back to typing.