The Model 3000 is exceedingly rare and was probably first offered for sale in the late 1950's. (We have seen a magazine ad for the model 3000 dated 1957 so we know it is at least that old.) It was designed so that it could be a free-standing computer or it could be reconfigured to be rack mounted.
As of 1957 the computer was selling for $1,150.00 which is equivalent to $13,220.00 in 2025.

Programming was done by patchcords. This means that if you wanted to program the analog computer you had to configure the patchcords in just the right way. And if you then wanted to run a different program...you had to unplug all the patchcords and reconfigure them. Imagine having to use patchcords instead of your keyboard or mouse or touchpad to enter information into your computer.

History of the Donner Scientific Company

Donner Scientific Company was founded in 1953 in Berkeley, CA by William Rosenberry and was named after Donner Pass. The company moved to Concord, CA in 1954. They began making the Model 30 Analog Computer (a vacuum tube computer) and sold 600 units between 1954 and 1960. Donner Scientific merged with Systron Corp. to become Systron Donner Corp. on March 31, 1960.

Systron Donner is still in existence in the same city. They are called "Systron Donner Inertial" and make sensing devices (such as gyroscopes) for all sorts of modern tecnologies such as the Mars Rover (really, they are on Mars!), military helicopters, UAVs, torpedoes, and robots.
Alas, on June 10, 2019, EMCORE acquired Systron Donner Inertial for $25.8 million, including $22.8 million in cash and 810,698 shares, to scale its navigation systems.