What! Nobody's mentioned

Mnenomic for the value of e

    * e starts with 2.7
    * e = 2.71828 (the 1828 is the first year Andrew Jackson elected president)
    * e = 2.718281828 (repeat 1828 since Jackson served two terms)
    * e = 2.71828182845 (45 = 90/2)
    * e = 2.7182818284590 (the 90)
* e = 2.718281828459045 (the other 45)

or for pi

3.14159265: 14..92, 15..65. I leave it to you to work out the meaning for the dates.

or

Oh be a good girl and kiss me quick

for the stellar main sequence: O, B, A, G, K, M, Q


What did you folks do in high school science? We learned stuff like this!