A 32-bit number that masks an IP address, and divides the IP address into network address and host address.

"Subnet masks are used in IP networking to break down larger networks into smaller, sub-networks (or subnets)."

In the context of software, refers to frameworks or platforms that prescribe a certain way of doing things, often through a set of conventions or default configurations.

"Opinionated frameworks can greatly simplify development by reducing the number of decisions a developer needs to make, but they can also be restrictive."

A Git command used to upload local repository content to a remote repository.

"After making commits locally, you use 'git push' to transfer your changes to the remote server, making them available to other collaborators."

In computing, a term sometimes used metaphorically to refer to a process or entity of which there must be only one in a given context or system.

"The 'Highlander principle' might be applied in software design to ensure that only one instance of a particular resource or service is active at any time."

A tool that processes input data to produce output that is used as input to another process, often used in programming languages for macros and includes.

"The C preprocessor modifies the source code before it is compiled, handling directives for file inclusion, macro definitions, and conditional compilation."