Computer literacy: what does the software MSDN, OEM, RTM version mean

We often hear about the MSDN version, the OEM version, and the RTM version of the software. What do they mean? What is the difference?

(1) MSDN (Microsoft Developer Network) Edition

MSDN software is a version of Microsoft's software developers. MSDN covers all platforms and applications that can be developed and expanded, such as Microsoft Encarta encyclopedia, or various games, which are not included in MSDN, because these products are directly oriented to end users, without program development. necessary.

(2) OEM (Original Equipment Manufacturer) Edition

OEM software can only be shipped from random machines, not retail, so it is also called random version. OEM software can only be installed completely, and cannot be upgraded from the old operating system. If you buy a laptop or a branded computer, you will have a random version of the software. Packaging is not as beautiful as the retail version, usually with only a cd and a manual (authorization). Such systems usually have fewer drivers, and current OEM software is rarely installed on CDs, either as a recovery disk or as a hard disk image.

(3) RTM (Release to Manufacturing) version

Before the software is officially put on the retail store, it takes a while to compress, package, and distribute the software, so the program code must be officially released. It will be completed a while ago. The completed program code is called final.code. After the program code is developed, the master chip is sent to the factory for a large number of compression. This version is called rtm version. The rtm version of the program code is the same as the official version. However, it is different from the official version: for example, the oem in the official version cannot be upgraded, and the upgraded version will check the old operating system CD if it is newly installed. These are the different places of rtm and the official version, but their main program code. all the same. Strictly speaking, this version is still a retail version of fpp and needs to be activated.