Calculated Industries CONSTRUCTION MASTER IV User Manual page 22

Memory is semi-permanent, clearing
only when you:
1) turn off the calculator;
2) press [Rcl] [Rcl];
3) press [Conv] [Rcl];
4) press [Conv] [x] (all clear).
How to Use Memory Functions:
Keystroke
355 [M+]
255 [M+]
745 [Conv] [M+]
[Rcl] [Rcl]
10 [Feet] 5 [Inch] [M+]
5 [Feet] 3 [Inch] [M+]
[Rcl] [Rcl]
22 — Construction Master IV
Display
355. M
255.
M
745. M
– 135.
10 FT 5 IN M
5 FT 3 IN
M
15 FT 8 IN