E2

Electronics

silicon and reverse/forward-bias at boron(+) and phosphorus(-) doped junctions
the transistor vs. the vacuum tube and how it functions as an electronic switch
basic logic gates: rtl, dtl, ttl, cmos
and/or
nand/nor/xor/xnor
flip-flops: r/s, j/k, d
free online dictionary of computing contents: http://foldoc.org/contents.html
ibm pc/xt
pc i/o breadboard
sockets
eprom images
assembly language
debugging
troubleshooting

Raw (Materials)
Media (Digital)
Processing
Power (Energy)

Math & Physics

arithmetic, algebra, accounting, trigonometry, geometry
differential and integral calculus, statistics
statics, dynamics, thermodynamics

Chemistry

 - https://archive.org/details/CRC.Press.Handbook.of.Chemistry.and.Physics.85th.ed.eBook-LRN/page/n273/mode/2up