Radio Shack EC-242 (MEMORY)
 
  The Radio Shack EC-242 is an arithmetic calculator with 8 digits precision and algebraic logic. It has 5 functions, 22 keys, and an LED (light-emitting diode) display typical of calculators of this era. The power source is PP3 9V battery.
Facts at a glance:
| Feature | Value | 
|---|---|
| Type | Arithmetic | 
| Functions | 5 | 
| Keys | 22 | 
| Precision | 8 | 
| Logic | Algebraic | 
| Display type | LED | 
| Length | 146mm | 
| Width | 76mm | 
| Power Source | PP3 9V battery | 
| Year introduced | 1976 | 
| Year discontinued | 1978 | 
Replacements:
If you have a Radio Shack EC-242 that is no longer working, you can first try replacing the PP3 9V battery. If that doesn't solve the problem, then you can consider replacing the calculator with a modern equivalent.
We suggest the following current models as possible replacements: