Kdb+ operating system version as a symbol.
q).z.o
`w32
Values for V3.5+ are shown below in bold type.
| os | 32-bit | 64-bit |
|---|---|---|
| Linux | l32 | l64 |
| macOS | m32 | m64 |
| Solaris | s32 | s64 |
| Solaris on Intel | v32 | v64 |
| Windows | w32 | w64 |
Note this is the version of the kdb+ executable, NOT the OS itself. You might run both 32-bit and 64-bit versions of kdb+ on the same machine to support older external interfaces.