A family of multitasking, multiuser computer operating systems that derive from the original AT&T Unix.

"Unix is known for its portability, flexibility, and robustness and is widely used in servers, workstations, and mobile devices."

A technology that enables voice communication and multimedia sessions over the internet, allowing users to make phone calls, video calls, and send messages using IP-based networks, often providing cost savings and flexibility compared to traditional telephony systems.

"Skype and Zoom are popular VoIP services for video conferencing and online meetings."

A programming language whose implementations are typically compilers (translators that generate machine code from source code), and not interpreters (step-by-step executors of source code, where no pre-runtime translation takes place).

"C and C++ are examples of compiled languages, where the source code is compiled into executable binaries before running on a computer."

A special value in programming used to represent the absence of a value.

"In databases, a null value indicates that a field contains no data, which is different from a field that contains data such as an empty string or a zero."

Software used to write and edit text, especially code for software development.

"Popular text editors for coding include Sublime Text, Atom, and Visual Studio Code."