Abstract Syntax Tree

An abstract syntax tree (AST) is a data structure used in computer science to represent the structure of a program or code snippet. It is a tree representation of the abstract syntactic structure of text (often source code) written in a formal language. Each node of the tree denotes a construct occurring in the text. It is sometimes called just a syntax tree.

For Your Information

"FYI" is a common abbreviation of "for your information". The term, originally a wire service abbreviation used by journalists, is commonly used in email, instant messaging and other messages to indicate an informational message or explanatory statement not suggesting any action, or requiring a response. The abbreviation is also commonly used in spoken conversations.

United Nations Educational, Scientific and Cultural Organization

The United Nations Educational, Scientific and Cultural Organization (UNESCO) is a specialized agency of the United Nations (UN) with the aim of promoting world peace and security through international cooperation in education, arts, sciences and culture. It has 194 member states and 12 associate members, as well as partners in the non-governmental, intergovernmental and private sector. Headquartered in Paris, France, UNESCO has 53 regional field offices and 199 national commissions.