Privileg, the store brand of the German store chain Quelle, offered many interesting calculators over the years. Like Radio Shack/Tandy in North America, Privileg repackaged a variety of calculator models under its own OEM brand. In fact, next to Radio Shack, Privileg is probably the second most prolific OEM brand of programmable calculators.

The SR-12PR is Privileg's model number for a popular scientific calculator also known as the Citizen SRP-175 or the Canon F-800P. A true multifunction scientific model, the SR-12PR does just about everything you'd want from a decent engineering tool, with one huge exception: it is not possible to view/edit programs in its 128-step program memory, making program entry and modification needlessly difficult.

One clumsy feature of these machines' programming model is the way jump instructions are implemented: they only let you skip up to 9 program steps, forward or backward, in program memory. If your program requires that you skip over more steps, which is often the case, repeated use of GOTO is necessary. This is well illustrated in the following programming example, which computes the incomplete Gamma function. (To use this program, first place the integration limit in register 0, then enter the argument, and hit RUN 6):

01:  STO
02:  2
03:  RCL
04:  0
05:  STO
06:  1
07:  yx
08:  RCL
09:  2
10:  ÷
11:  RCL
12:  1
13:  ex
14:  ÷
15:  RCL
16:  2
17:  =
18:  STO
19:  3
20:  STO
21:  0
22:  1
23:  STO
24:  +
25:  2
26:  RCL
27:  1
28:  GOTO 1
29:  GOTO -9
30:  ÷
31:  RCL
32:  2
33:  ×
34:  RCL
35:  3
36:  GOTO 1
37:  GOTO -8
38:  +
39:  STO
40:  3
41:  RCL
42:  0
43:  =
44:  x<=M 1
45:  GOTO -8
46:  RCL
47:  1
48:  x<->M