Finally acquired a Woodstock

[Steve Simpkin]

(10-31-2017 11:45 AM)Gamo Wrote:  I noticed that this model came with full Scientific / Engineer functions with very limited program steps (49 steps) The only missing functions is the Factorial (n!) which is kind of weird that this model doesn't have. The Owner's Manual even included on how to program with Finding the Factorial Number Program as an Example.
I'm surprised that this model came with full Conditional Test.

Consider that the HP-25 was originally planned to be a non-programmable advanced scientific model. By including programmability, the engineers used up almost every word of code storage space (2048 microinstructions). There was no room to include additional features without removing something else.
http://www.hpmuseum.org/journals/wooda.htm