u

ud
udma
udp (user datagram protocol)
uhb
uhd
uhf
uhp
uhs speed class
ultra-wide angle lens
ultraviolet (uv)
umbrella
underexposure
underexposure:
undo
unipod
unsharp mask
upload
uprating
upsample
urban
url
usb
usd
usm
utc (coordinated universal tim
utp (unshielded twisted pair)
uv
uw
uxga
ufraw
ukiyo-e (woodblock prints)
ultra-sonic cleaner
umbra penumbra phenomenon
unbalanced
uncial
under exposed
under-exposure
undercrank
undercranking
underexposure, prints of darkn
underground railroad
undershoot
underwater creative mode
unghi de cuprindere
unicase
unicode
uniformity
uniqueid
unit production manager
unity gain
universal remote
unsteadiness
upconversion
upconvert
uploading
uppercase
uprezzing (upsampling)
upright moviola or uprigh
upstage
use case
usemymetrics
utility person
utopian
unjustified
umc (ultra multi coated)