A chemical inventory system routes hazardous substances to different storage zones based on the first character of their safety registration code.

Below is the pseudo-code for the algorithm used to determine the storage zone.

1 IF (code[0] >= "D" AND code[0] <= "K") THEN
2     SEND "Zone Green" TO DISPLAY
3 ELSE
4     IF (code[0] >= "L" AND code[0] <= "S") THEN
5         SEND "Zone Yellow" TO DISPLAY
6     ELSE
7         IF (code[0] >= "T" AND code[0] <= "Y") THEN
8             SEND "Zone Red" TO DISPLAY
9         ELSE
10            SEND "Specialist Containment" TO DISPLAY
11        END IF
12    END IF
13 END IF