Mini computer thin client Wyse V90 - mini PC with WindowsMs-dos and Win95/98 running, for machine control,
So, a PC with 2x RS-232, LPT (parallel port) and USB, power supply and stand

and USB DVD burner
At the moment, computers for DOS, Win95 and Win98 are in great demand. I would like to recommend this computer to you - it is small, fast, very reliable, has RS-232, LPT port (printer mail, parallell), sound card and USB.
All components work under Win98 including USB and sound card.
Wyse is not only extremely small, but also safe and shockproof. Instead of a hard drive, a disk-on module (quasi small SSD hard drive) with 512 MB of storage space, shockproof and suitable for continuous operation, was installed.
The Win98 operating system and all drivers can be found on the 512 MB disk-on-chip, with 200 MB remaining free. Is that much? Yes, it's not a little. Back when Windows98 was current, programs weren't as space-hungry as they are now; For example, the well-known game "Doom" needs from 4 MB of space, depending on the version, and "Prince of Persia" - approx. 1MB. You can store quite a lot in 200 MB.
    
Technical data:
1GHz CPU, 256 MB RAM, 512 MB disk-on-chip, DOM (fast IDE disk-on module, based on SSD technology), PCMCIA, 3x USB 2.0, 10/100 network card, 2x RS-232, sound card.

Only 20 watts of power consumption. With a relatively slow processor, you can also run DOS programs!
CPU: 1GHz
Memory: min. 256 MB up to 1 GB upgradeable (single slot notebook memory)
Hard drive: Disk-on-chip, 512 MB upgradable to 2 GB, notebook IDE connection, an IDE notebook hard drive can also be connected using an appropriate cable, CF card slot - a CF card can also be used as a hard drive.

Other interfaces:
2x Serial RS-232, 2x PS/2 (keyboard/mouse), parallel port (printer),
3x USB 2.0, PCMCIA, network: 10/100 Mbit
Sound: onboard with connections at the front
Dimensions: WxDxH: 20.1 x 4.6 x 18.0 cm
3.6kg weight
Security: Kensington Security Slot
Power: The scope of delivery includes a power supply, input 100-240 volts, 50/60 Hz, output: 12V, average consumption 17.2 watts
So: Power input needs 12 volts, so ThinClient can also be powered by 12V from a battery (car battery), for example on a boat.

Possible expansions: Instead of disk on chip, an IDE notebook hard drive can be connected (there is little space for it inside, but you can also use this PC without a case). You could also install an even smaller hard drive, a 1.8" hard drive (4.5cm), you can definitely accommodate one of those.
Alternatively, a USB hard drive can be connected, as well as a USB stick. Another possibility: If ThinClient is running in the network, every hard drive in the network can be shared.

From the manufacturer's flyer:

   
Condition: used, in good condition.
Scope of delivery: Wyse V90 with power supply and cable  + USB optical drive