A user is a person who utilizes a computer or network service.

Users of computer systems and software products generally lack the technical expertise required to fully understand how they work.

Power users use advanced features of programs, though they are not necessarily capable of computer programming and system administration.

Free software or libre software is computer software distributed under terms that allow users to run the software for any purpose as well as to study, change, and distribute it and any adapted versions.

Free software is a matter of liberty, not price: users—individually or in cooperation with computer programmers—are free to do what they want with their copies of a free software (including profiting from them) regardless of how much is paid to obtain the program.

Computer programs are deemed free insofar as they give users (not just the developer) ultimate control over the first, thereby allowing them to control what their devices are programmed to do.

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.

Notable examples are wikipedia.org, google.com, and amazon.com.

Today roughly 380 new websites are created every minute across the World.

A programming tool or software development tool is a computer program that software developers use to create, debug, maintain, or otherwise support other programs and applications.

The term usually refers to relatively simple programs, that can be combined together to accomplish a task, much as one might use multiple hand tools to fix a physical object.

The most basic tools are a source code editor and a compiler or interpreter, which are used ubiquitously and continuously.

Other tools are used more or less depending on the language, development methodology, and individual engineer, and are often used for a discrete task, like a debugger or profiler.

Tools may be discrete programs, executed separately – often from the command line – or may be parts of a single large program, called an integrated development environment (IDE).

In many cases, particularly for simpler use, simple ad hoc techniques are used instead of a tool, such as print debugging instead of using a debugger, manual timing (of overall program or section of code) instead of a profiler, or tracking bugs in a text file or spreadsheet instead of a bug tracking system.