This is a DEC “WT78” which I think is similar or identical to a DEC VT78. The naming is confusing, because the manuals call this unit a “DECstation”.
I haven’t yet opened this up to investigate it, but it came with a Word Processing Training Manual and a Word Processing User Manual.
Sitting on top of the unit was a “BC80D-5K” cable, to connect the WT78 to the RX02 floppy disk drive.
I tried to power this on for the first time on 19-OCT-2017. The drives spin, but no signs of life from the WT78. After removing power, I discovered that the 3A mains inlet fuse was blown. Unfortunately I didn’t check the fuse before applying power, so I don’t know if the fuse was already blown.
Is the VT78 the same as a WT78?
Here’s a quote from the VCFED DEC forum:
Q: “Do you know what were the differences between the VT78 and the WT78? Was it just software differences, i.e., the exlcusion of compilers, etc., and inclusion of the word processing software?”
A: “The VT/78 was an early micro (6100 based) PDP-8 that came with floppies and ran the standard OS/8 software, including PAL/8, Fortran, etc.
The WT/78 is the same hardware, except for some labeling. I believe it was shipped with a version of WPS, the menu based “office software” operating system.
Later 6120 based Decmates have the brain-dead terminal interface, and various attempted software kludges that CJL is so offended by.
So, yes, I think your characterization is correct. I wish I knew of an authoritative place to confirm what software shipped with the WT/78, but everything I have seen so far supports the theory that it came with office (rather than scientific) software.”
Below are links to some manuals (there will likely be other manuals that are relevant as well).