grammatical number - Plural form of the acronym LASER

I'm writing a technical report and must use the plural form of LASER. Seeing as it is an acronym, how does one add the 's'?

Answer

The acronym LASER describes a process, not equipment. Modern usage is lasing for the process, and laser has become an ordinary noun. So for multiple devices operating on the LASER principle: "lasers" or "LASERs". Preferably the first, without all caps.