These definitions contain illustrations:
apogee
bandpass filter
cathode ray tube
coaxial antenna
coaxial cable (illustrated)
ground-plane antenna
laser
logic gate
perigee
phase
polarization
Venn diagram
waveform
wavelength
B-tree
binary tree
entity-relationship diagram
Gantt chart
PERT chart
quad tree
splay tree
tree structure
bus network
cable modem
horn antenna
mesh network
OSI Reference Model illustrated
ring network
star network
topology
tree network
136 browser colors with names
216-color browser-safe palette
21 Sep 2005