The theme song and introduction to The Big Bang Theory illustrates economic growth over time.
Read MoreThe Floppy Disk
Sheldon is discussing his list of mortal enemies, which he keeps on a 5.25 inch floppy disc.
Read MoreLong-Distance Kissing
Howard builds a machine which enables 2 people to simulate a human kiss.
Read MorePenny Learns About an Assembly Line
Sheldon introduces to Penny the notion of the assembly line.
Read MoreProfits for Penny Blossoms
Penny starts a business selling hair barrettes and begins discussing her production capacity and revenue from a single day of work.
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