A command-line user interface (CLI), also known as a console user interface, and character user interface (CUI), is a means of interacting with a computer program where the user (or client) issues commands to the program in the form of successive lines of text (command lines).

A program which handles the interface is called a command language interpreter or shell.

A website is a collection of related web pages, including multimedia content, typically identified with a common domain name, and published on at least one web server.

A website may be accessible via a public Internet Protocol (IP) network, such as the Internet, or a private local area network (LAN), by referencing a uniform resource locator (URL) that identifies the site.

In programming languages, a type system is a set of rules that assign a property called type to various constructs a computer program consists of, such as variables, expressions, functions or modules.

The main purpose of a type system is to reduce possibilities for bugs in computer programs by defining interfaces between different parts of a computer program, and then checking that the parts have been connected in a consistent way.

This checking can happen statically (at compile time), dynamically (at run time), or as a combination of static and dynamic checking.

Type systems have other purposes as well, such as enabling certain compiler optimizations, allowing for multiple dispatch, providing a form of documentation, etc.

A software developer is a person concerned with facets of the software development process, including the research, design, programming, and testing of computer software.

Other job titles which are often used with similar meanings are programmer, software analyst, and software engineer.