In computing, DOC or doc (an abbreviation of 'document') is a filename extension for word processing documents, most commonly in the proprietary Microsoft Word Binary File Format

A second storage device is a non-volatile device that holds data until it is deleted or overwritten. In these devices, the data would remain intact even after turning off computer.

The Domain Name System (DNS) is a hierarchical distributed naming system for computers, services, or any resource connected to the Internet or a private network.

Spell check is an application program that flags words in a document that may not be spelled correctly. Spell checkers capable of operating on a block of text, such as a word processor, email client, electronic dictionary, or search engine.

Computer forensics is the practice of collecting, analyzing and reporting on digital data in a way that is legally admissible. 

Note: It can be used in the detection and prevention of crime and in any dispute where evidence is stored digitally.

Telnet is a network protocol that allows a user on one computer to log into another computer that is part of the same network

CPUs are also known as microprocessors, meaning they are contained on a single integrated circuit (IC) chip.

An IC that contains a CPU may also contain memory, peripheral interfaces, and other components of a computer; such integrated devices are variously called microcontrollers or systems on a chip (SoC).

Corel Draw is a vector graphics editor. A vector graphics editor is a computer program that allows users to compose and edit vector graphics images interactively on a computer.

In the context of relational databases, a foreign key is a field (or collection of fields) in one table that uniquely identifies a row of another table or the same table. In simpler words, the foreign key is defined in a second table, but it refers to the primary key in the first table.

Application package software is licensed from third-party software providers to fulfill a specific business purpose.