The Data Handler is a SBC (actually two boards!) built in 1975 by Western Data Systems Corporation.
One of the first computers based upon the then new 6502, as the KIM-1. Jolt, OSI 300.

Photos and blog about this SBC by Armin Zink, who owns a Data handler.

The following text and scans of the manual are by Armin Zink on his blog.

The KIM-1 Simulator is now at version 1.1.4. Not much news, just some small steps. Windows executable is updated, Linux versions require compiling sources.

– Feedback made me change the behaviour of Run/Stop state when the debugger’s Run facilities were used: the Run/Stop state is set to not running to enable stepping in debugger
– SST switch now tells it is not to be used for debugging.- Use of Lazarus Icons to improve design, Main menu now shows icons:

Written by 2021 by Joerg Walke, visit his webiste for the most actual version!
The Junior Computer ][ is an expanded version of the original Junior Computer. To make it more useful, I’ve equipped it with 32KB RAM, 8KB ROM and an onboard RS232 serial interface for connecting a terminal or a printer. For the use with a terminal, I also wrote an extended monitor program thats included in the bigger ROM. The development of the Junior Computer ][ is still in progress, so some other features will find its way to the mainboard.On the picture above, you can see the actual rev. 2 board of the Junior Computer ][.The new revision 3 board has arrived!…all components assembled and soldered…and it works fine!

Thanks to Friedrich Hofmann I have added information on the Video PLUS II and DRAM PLUS borads to The Computerist page.

Recently on Ebay a KIM-1 lookalike showed up. The PCB is inspired but clearly newly designed. It is called ‘Scandinavian’ because another identical ‘clone’ had a scandinavian businness sticker on it. Armin Hierstetter bought it and send me photos shown on the “KIM-1 related’ page.