W
W !!! Now, HERE IS a blast from the past !!!
Betcha you don't have one of these
What do we have here ?? .....
Hopefully, YOU know so you can take advantage of this deal ..
According to the included Installation Instructions: " The KB-105-S keyboard is designed for using with the Apple IIe computer and
works with {THEN} current versions of USPS training software without modification. As
with previous MPFSM training setups the following additional equipment will be required.
1- Apple IIe computer with Monitor and Disk Drive (5.25"){NOT INCLUDED}
2- Apple Imagewriter Printer w/ Super Serial Card correctly installed in Slot # 1{NOT INCLUDED}
3- Thunderware Thunderclock Plus Card correctly installed in Slot # 4 {NOT INCLUDED}
4- An Apple Super Serial Card for the KB-105-S installed in Slot # 2 "{NOT INCLUDED}
etc.......
Did we really have to say {NOT INCLUDED} 
Oh well, why not cover the obvious 
Doing some research on the Net, we learned that MPFSM stand for Multi-Position Flats Sorting Machine.
On the left of this panel keyboard are keys that say:
REPEAT, 2 DIG. 7, 8, 9, CL, 4, 5, 6, {blank one}, 1, 2, 3, REJ, 0, {another blank one}
To the right is a large button that says: EMERGENCY STOP
Below that is a red button that says: STOP
To the left of that is a black button that says: START
Also included is a 5 1/4" floppy disk that says:
Labworks Inc.
KB-105-S TEST
It is untested.
It will be an as is sale.