multiple
Boolean
Janus-like
ambidextrous
base 2
base-2
bifacial
bifold
biform
bilateral
binary star
binate
biparous
bivalent
conduplicate
disomatous
double
double star
double-barreled
double-faced
dual
dualistic
duality
duple
duplex
duplicate
dyadic
geminate
geminated
second
secondary
twin
twinned
two
two-faced
two-level
two-ply
two-sided
two-story
twofold
computer program
computer programme
program
programme
32-bit
decimal
digital
discrete
functional
graphical
linear
mathematical
molecular
numeric
numerical
proprietary
serial
ternary
valid
finery
refinery
winery
ASCII
text