This document discusses programming languages and provides details about some popular languages. It begins by defining what a programming language is and discusses different levels of languages. It then covers types of languages like imperative, object-oriented, logic/declarative, and functional/applicative. Examples of some top high-level languages are given, including C, C++, Java, HTML, and XML. Brief descriptions of C, C++, and Java are also provided. The document concludes by stating that programming languages are used to access hidden computer information.