![IBM System/23 Datamaster Maintenance Manuals](https://www.nf6x.net/wp/wp-content/uploads/2014/08/IMG_1224-150x135.jpg)
Another IBM System/23 Datamaster collector just sent me these scanned maintenance manuals. I haven’t had a chance to take a close look to them yet, but I can already see they’re going to be very helpful because at least one of them includes PINOUTS! They’ve also been sent over to Bitsavers for archival. Enjoy!