Objective-C
Software / App
Language used for macOS/iOS development before Swift.
Mentioned in 6 videos
Common Themes
Videos Mentioning Objective-C

A brief history of programming...
Fireship
Language used for macOS/iOS development before Swift.

Startup Technology - Technical Founder Advice
Y Combinator
A programming language used for iOS native development by Plain Grid.

Chris Lattner: Compilers, LLVM, Swift, TPU, and ML Accelerators | Lex Fridman Podcast #21
Lex Fridman
An object-oriented programming language, an extension of C, that was historically dominant at Apple and compiled using LLVM/Clang.

John Carmack: Doom, Quake, VR, AGI, Programming, Video Games, and Rockets | Lex Fridman Podcast #309
Lex Fridman
The programming language used by NeXT, which had elements that later became part of macOS development and its tools.

Kevin Systrom: Instagram | Lex Fridman Podcast #243
Lex Fridman
The programming language used for the client-side (iPhone-only) of Instagram in its early days.

MMOs in the Instagram Era: Highrise (S18) - YC Gaming Tech Talks 2020
Y Combinator
A language used for bridging components between the UI and game engine on the iOS side in Highrise's architecture.