The document describes several popular programming languages: C++ was developed in the 1980s as an extension of C that added object-oriented programming capabilities. Objective-C is based on C and was developed in the 1980s, becoming the main language for Apple software. Visual Basic and Visual C# were introduced by Microsoft in the 1990s/2000s to simplify Windows application development and support object-oriented programming. PHP and JavaScript are widely used scripting languages, with PHP used on websites like Wikipedia and Facebook and JavaScript used for web page interactivity. Ruby on Rails combines the Ruby language with a web framework and was used to build Twitter's interface. Scala uses object-oriented and functional paradigms and integrates