Most system commands are documented on their own page / topic. Some, however, require only a few lines of text and are gathered below.
DEVTBL
DEVTBL displays the names of the defined A-Shell devices. This is essentially just a list of the DEVICE statements from miame.ini.
You can use the PPN command on any of the defined devices to display the available PPNs on that device.
SAVE <name.ext> {/delete}
SAVE saves a module from user memory to disk. The /delete switch is needed to overwrite an existing file.
SLEEP #{.#}
SLEEP puts the current job to sleep for the specified number of seconds with optional fraction of a second.
SLEEPR {date} HH:MM {AM/PM}
SLEEPR puts the current job to sleep until a specified time.
The date should be in numeric format with dashes or slashes. Time may be in 12 hour or 24 hour format. AM is assumed if not specified and hour less than 13.