This tag should be used for question about Windows Subsystem for Linux version 2. It should not be used for WSL version 1.

Lighttpd is a lightweight and high-performance event-driven web server.

Enterprise refers to software intended to facilitate the operation of one or more types of business entities, such as cooperatives, companies, universities, and government organizations.

Vector graphics is the use of geometrical primitives such as points, lines, curves, and shapes or polygon(s), which are all based on mathematical equations, to represent images in computer graphics. Images are drawn at run-time from the information stored, and so vector images do not get distorted after zoom/resize etc.

Cryptography function that takes random bits and a string (typically a password) and uses a one-way hash to provide a new string that can be used for authentication without providing access to the original string. If a salt function uses enough random bits, the resulting string is generally considered cryptographically secure.

Force user input to conform to given rules.

A QGraphicsView is a class from the Qt toolkit which provides a widget for displaying the contents of a QGraphicsScene.

Sitecore is a Web Content Management System built on Microsoft ASP.net. This tag relates to version 6 of Sitecore

In general a framebuffer is a graphic hardware-independent abstraction layer used to display output to a monitor or display.

IRC - Stands for Internet Relay Chat is an internet based chat protocol. Main idea is to have users connect to a server network, where they can then send messages to each other through channels or direct chat. Today there's quite a few different networks, usually each with a main thematic. Stack Overflow got its own channel on the FreeNode network. You can read more about that on the full tag wiki page.

Cognos is an IBM subsidiary which provides a range of business intelligence and performance management products.