IBM1620๐บ๐ธ AmericanerdycomputersfunnyThe IBM 1620 was an early scientific computer from 1959. Maybe they work for IBM?
VI4EVER๐บ๐ธ AmericanerdysoftwarenameprogrammerVi forever - maybe referring to the text editor program "Vi"? It could also be someone's name.
DP/DT=?๐บ๐ธ Americamathnerdy'dP / dt' is defined as the rate of change of pressure with respect to time