https://softwareengineering.stackexchange.com/questions/46716/what-technical-details-should-a-programmer-of-a-web-application-consider-before?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa
Name
Definition
CR
Change Request/Candidate Release (in versoning)
IR
Incident Report
PR
Problem Reports
https://en.wikipedia.org/wiki/Change_management_(engineering)
https://superuser.com/questions/3736/what-is-a-pr-what-does-pr-stand-for-in-the-context-of-freebsd-ports?utm_medium=organic&utm_source=google_rich_qa&utm_campaign=google_rich_qa
http://portsmon.freebsd.org/