That is also a HP [17623A](https://www.computerhistory.org/collections/catalog/102704284/) Graphics Tablet.
**Specifications**
Active digitizing area: 295 x 225 mm (11.6 x 8.8 in.)
Resolution: (points within active digitizing area): fine-2048 x
1560, coarse-51 2 x 390 (matches CRT)
Repeatability: ± I resolution unit
Cursor tracking rate (local): 30 pts/s
Coordinate transfer rate: assumes asynchronous data transfer; de-
pends on computer activity and data communication rate, e.g.,
ASCII @ 2400 BAUD-up to 15 pts/s
@ 9600 BAUD-up to 60 pts/s
Binary @ 2400 BAUD-up to 34 pts/s
@ 9600 BAUD-up to 60 pts/s
Heavy system activity can severely degrade these rates.
Platen technology: electrostatic
Document material: single sheet, electrically nonconductive, ho-
mogenous, less than 0.5 mm thick
Environmental range: 0° to 55°C, 5% to 80% RH (40°C), EMI
meets YDE requirements with the HP 2627A and HP 2623A termi-
nals on HP 1000, HP 3000, and HP 9000 series computers
Power consumption: 5 W max (supplied from the terminal)
Dimensions: 467 Lx 367 W x 38 mmH (18.4 in. x 14.4in. x 1.5 in.)
Weight (tablet and interface module): net, 3.62 kg (8.0 Ib); shipping,
6.8 kg (15.0 Ib)
**Accessories Supplied**
Operator's Manual
Stylus Refills (2 Inkless, 3 Ink)
Overlay (I)
Pretty sure it had a grid of wires under the surface. Also required many chips and a rigid metal frame.
The ink could be used on a sheet of velum paper so you could see what you are drawing live on the digitizer.
Or you could still have an original drawing underneath and the ink will show what you have already traced.
Here's a color picture of the front: [https://www.hpmuseum.net/images/2700-45.jpg](https://www.hpmuseum.net/images/2700-45.jpg)
16 out of 4096 colors at 512 x 390, so sort of a fancier EGA.
[This literature](https://www.computinghistory.org.uk/userdata/images/large/67/49/product-86749.jpg) calls them "Mini Disc Drives", so I assume they're 5.25".
The fact that the operator is working on the diagram by hand while the CAD station is unused makes this image rather less of a flex than HP intended.
Also, proto-MLP poster on the wall!
He hand draws the diagram and then brings the drawing to the digitizer to put it into the computer by tracing it.
Everything was paper based back then.
Isso me lembra as mesas digitalizadoras, no começo do mês anos 90s no AutoCAD ou no Microstation usávamos mesas pequenas para comandos e pranchetas A0 para desenho, embora esse computador seja mais antigo o design era assim.
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