ZM

ZM is an abbreviation that can refer to several different things depending on context. This article highlights a few notable meanings in geography, science, and computing.

Zambia (country code)

ZM is the ISO 3166-1 alpha-2 code for Zambia. It is used in international data exchanges and vehicle registration, and serves as a shorthand identifier for the country in various standards and formats. The internet country code top-level domain for Zambia is .zm.

Zettameter (SI unit)

In the International System of Units, the prefix zetta denotes 10^21. When combined with the metre, the symbol Zm denotes a zettameter, a unit used to express extremely large distances in astronomy and cosmology. The symbol is case-sensitive: Zm (uppercase Z, lowercase m).

Z-machine (computing)

The Z-machine is a virtual machine originally developed by Infocom to run its text adventure games, such as Zork. It enabled the same game code to operate across multiple computer platforms and became a notable technology in the history of interactive fiction. References to the Z-machine are sometimes shortened in casual discussions to “ZM,” though the formal name remains Z-machine.