They really have lots of time in their hands.

Trying to prove a theory that anything with a processor can be infected, a new, proof-of-concept virus affecting a calculator has been discovered.

Yes, a calculator.

To be specific, the calculator in question is the graphing calculator by Texas Instruments, TI-89. This is a file infector (replicates by inserting its code into files) that clears the screen and displays text.

Kaspersky detects this virus as Virus.TI.Tigraa.a.

This virus would have been cooler if what it does is to obfuscate the answer to 1+3.