Objective-C is a programming language that was primarily used for developing applications on Apple's platforms, such as iOS and macOS. It is an object-oriented language, which means it allows developers to create reusable code by defining objects that represent real-world entities. This makes it easier to manage complex software projects. Originally created in the early 1980s, Objective-C combines elements of the C programming language with Smalltalk-style messaging. This unique blend allows for dynamic runtime capabilities, enabling developers to write flexible and powerful applications. Although it has been largely replaced by Swift, it remains an important part of Apple's development history.