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10 Structured System Variables

10.1 ^$CHARACTER   Character set information.
10.2 ^$DEVICE   Device information.
10.3 ^$DISPLAY   Information about graphic display.
10.4 ^$EVENT   Information supplied about a synchronous or asynchronous event.
10.5 ^$GLOBAL   Information about M globals.
10.6 ^$JOB   Information about and control of FreeM jobs.
10.7 ^$LOCK   Information about the FreeM lock table.
10.8 ^$OBJECT   Information about FreeM objects.
10.9 ^$ROUTINE   Information about FreeM routines.
10.10 ^$SYSTEM   Information about the running system.
10.11 ^$WINDOW   Configuration of MWAPI windows.
10.12 ^$ZPROCESS   Information about and control of system processes.
10.13 ^$ZRPI   Information about and control of Raspberry Pi GPIO pins.

SSVN subscripts are each described in the following format:

<ssvn-subscript-name> +/-R +/-U +/-D

The R, U, and D flags represent Read, Update, and Delete. A minus sign indicates that the given operation is not allowed, and a plus sign indicates that the given operation is allowed.

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