Construction Master IV Special Edition

| Year of introduction | 2002 |
| Function | Construction |
| Model Number | 4045SE |
| Power | 1 3-volt lithium battery |
| Original Price | $69.95 |
| Photo credit | Mark Bollman→ |
The Construction Master IV Special Edition was released in 2002 to commemorate the 25th anniversary of Calculated Industries. This is a slight functional modification of the Construction Master IV--the wt/vol function and the stairway functions on the number keypad are new to this version. Additionally, this is the first Construction Master calculator to sport a streamlined design and hard sliding cover.
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