| computer programming language | cella | 2011 | Branchable | 0 | Contains | 0 |
| Objective-C | cella | 2011 | Branchable | 0 | 11388 |
| Objective-C tutorial by Scott Stevenson | cella | 2011 | Branchable | 0 | Contains | 0 |
| The Objective-C Programming Language in developer.app.com | cella | 2012 | Branchable | 0 | Contains | 0 |