A chain of custody is a chronological paper trail documenting when, how, and by whom individual items of physical or electronic evidence - such as cell phone logs - were collected, handled, analyzed, or otherwise controlled during an investigation.

Explanation
Version control, also known as source control, is the process of tracking and managing changes to files over time. VCS - version control systems - are software tools designed to help teams work in parallel.
https://www.perforce.com/blog/vcs/what-is-version-control

Heuristic analysis is also one of the few methods capable of combating polymorphic viruses -- the term for malicious code that constantly changes and adapts. Heuristic analysis is incorporated into advanced security solutions offered by companies like Kaspersky Labs to detect new threats before they cause harm, without the need for a specific signature.
https://usa.kaspersky.com/resource- center/definitions/heuristic-analysis