A numbering scheme or indexing convention in computer science and programming where the first element in an array, list, or sequence is assigned an index of zero, rather than one, leading to the offset of one between the index and position of elements.

"In a zero-indexed array, the first element is accessed using index 0, the second element with index 1, and so on."

A placeholder commonly used in mathematics, programming, and formal languages to represent the last element or endpoint in a sequence, range, or dimension, often in conjunction with 'x' and 'y' to denote three-dimensional coordinates or variables.

"The point (0, 0, z) represents a location along the z-axis in three-dimensional space."

A command interpreter and shell scripting language for Unix-like operating systems, known for its extensive customization options, interactive features, and support for plugins and themes, often used as an alternative to the Bourne shell (bash) and other Unix shells.

"He customized his zsh configuration with aliases and prompt themes to improve his shell experience."