HP TC1100
Sheldon used his TC1100 to make notes during the experiment.
![](/snapshots/big_bang_theory_s3e23_tc1100_1.jpg)
![](/snapshots/big_bang_theory_s3e23_tc1100_2.jpg)
The guys conduct an experiment to bounce a laser off the moon and Howard and Raj plot to find a girlfriend for Sheldon.
Sheldon used his TC1100 to make notes during the experiment.