Speech recognition is the inter-disciplinary sub-field of computational linguistics that develops methodologies and technologies that enables the recognition and translation of spoken language into text by computers.

It is also known as automatic speech recognition (ASR), computer speech recognition or speech to text (STT).

It incorporates knowledge and research in the linguistics, computer science, and electrical engineering fields.

A text editor is a type of computer program that edits plain text.

Such programs are sometimes known as "notepad" software, following the naming of Microsoft Notepad.

Text editors are provided with operating systems and software development packages, and can be used to change configuration files, documentation files and programming language source code.

In computing, a web application or web app is a client–server computer program which the client (including the user interface and client-side logic) runs in a web browser.

Common web applications include webmail, online retail sales, online auctions, wikis, instant messaging services and many other functions.

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 typewriter is a mechanical or electromechanical machine for writing characters similar to those produced by printer's movable type.

Typically, a typewriter has an array of keys, and pressing one causes a different single character to be produced on the paper, by causing a ribbon with dried ink to be struck against the paper by a type element similar to the sorts used in movable type letterpress printing.

Commonly a separate type element (called a typebar) corresponds to each key, but the mechanism may also use a single type element (such as a typeball) with a different portion of it used for each possible character.

At the end of the nineteenth century, the term typewriter was also applied to a person who used a typing machine.