The category of software.
Original equipment manufacturer (OEM)
There are various types of software licence, including free software (open source) where the user does not have to pay, and click-wrap, which is presented to the user on-screen during installation of (paid-for) software.
Microsoft Volume Licensing (MVL)
The number of software licenses, which are contracts which allow a business or individual to use a piece of software.
Reseller Option Kit (ROK)
The minimum hard disk space required to store or run a computer program or operating system.
The smallest amount of RAM (random access memory) required to perform a particular function.