Oberon
- Algorithms and Data-Structures – Niklaus Wirth (PDF)
- Object-Oriented Programming in Oberon-2 – Hanspeter Mössenböck (PDF)
- Programming in Oberon – Niklaus Wirth (PDF)
Objective-C
- Google’s Objective-C Style Guide
- Object-Oriented Programming with Objective-C
- Objective-C Succinctly, Syncfusion (PDF, Kindle) (email address requested, not required)
- Programming With Objective-C
- Try Objective-C Book
OCaml
- Developing Applications With Objective Caml
- Real World OCaml
- Think OCaml – Allen B. Downey and Nicholas Monje
- Unix System Programming in OCaml Github Repo
- Using, Understanding, and Unraveling The OCaml Language: From Practice to Theory and vice versa – Didier Rémy