solid oxide fuel cell (SOFC)

solid-propellant rocket (solid-fuel rocket)

Proton Exchange Membrane Fuel Cell (PEM fuel cell, PEMFC)

Complementary metal–oxide–semiconductor (CMOS) / Complementary-symmetry/metal-oxide semiconductor

solid acid fuel cell (SAFC)

Average cell voltage (main battery voltage / cell count)

solid fuel

Firedragon (solid fuel)

fuel cell (FC)

alkaline fuel cell (AFC)

direct methanol fuel cell (DMFC)

sodium oxide

oxide

sulfur oxide SOx

black oxide

nitrogen oxide (NOx)

nitrous oxide (N2O)

metal-oxide-silicon

metal-oxide-silicon integrated circuit

multilayer aluminum-silicon oxide-silicon dioxide combination

tin oxide

zinc-oxide lightning arrester

thermal oxide

metal-oxide-semiconductor field-effect transistor (MOSFET)

solid masonry structure

solid propellant

solid-propellant charge

solid-propellant rocket engine / motor

two-stage solid-propellant ballistic vehicle

solid rocket motor

solid retention time

all-solid launch aeroballistic

unguided solid propellant rocket