The Burroughs C3317, like the C3300, was designed and produced in Japan by Hayakawa, better known as Sharp.
The C3317 is a clear successor to the C3300, it retains the same basic layout, the 'adding machine style' equals key logic and two memories.
More importantly, the C3317 is now programmable with two program memory areas, selectable by the P1 / P2 slider switch.
Most importantly, the C3317 appears to have logical branching capability making loops and iterations possible.
DoPECC's C3317 has no documentation or manuals and the machine is still waiting for restoration before it can be powered up, so information is limited at this stage.