2D
3D
3M
4GL
4H
4WD
A
A&A
A&M
A/D
A/P
A/R
AA
AAA
AAAL
AAAS
AAII
AAMSI
AAO
AAP
AAR
AARC
AARN
AARP
AAS
AAVSO
AB
ABA
ABBR
ABC
AC
ACAA
ACAWS
ACBL
ACC
ACCS
ACD
ACE
ACF
ACHEFT
ACK
ACL
ACLU
ACM
ACRV
ACS
ACSE
ACT
ACTS
ACU
ACW
AD
Ad Astra
AD&D
ADAP
ADB
ADC
ADCI
ADF
ADM
ADP
ADPCM
ADS
ADSR
ADT
AE
AEA
AEC
AEF
AEGIS
AF
AFADS
AFATDS
AFB
AFC
AFCAC
AFCC
AFGE
AFIPS
AFL
AFLCIO
AFNOR
AFP
AFS
AFSC
AFSCME
AFTRA
AFV
AG
AGCT
AGN
AHL
AHQ
AI
AIAA
AIC
AID
AIDDE
AIDS
AIOD
AIS
AIX
AJ
AK
AKA
AL
ALA
ALB
ALBM
ALC
ALGOL
ALIT
ALPO
ALS
ALU
AM
AMA
AMARC
AMBA
AMC
AMD
AMEX
AMI
AMORC
AMP
AMPAS
AMRAAM
AMROC
AMSAT
AMU
AMVET
ANA
ANAC
ANC
ANDF
ANF
ANG
ANI
ANL
ANOVA
ANPA
ANSI
ANZUS
AO
AOA
AOL
AOS
AP
Ap.J
APA
APB
APDA
API
APICS
APL
APO
APP
APPC
APR
APSE
APU
AQ
AR
ARC
ARCNET
ARO
ARP
ARPA
ARPANET
ARRL
ARV
AS
ASA
ASAP
ASC
ASCAP
ASCC
ASCII
ASDIC
ASDSP
ASG
ASHRAE
ASIC
ASME
ASN
ASP
ASRM
ASSR
AST
ASV
AT
AT&T
ATA
ATACC
ATB
ATC
ATDRS
ATF
ATIS
ATLAS
ATM
ATO
ATOMS
ATP
ATPCO
ATT
ATTIS
ATV
AU
AUI
AURA
AUS
AUTODIN
AUTOVON
AV
AVD
AVLIS
AW&ST
AWACS
AWEA
AWG
AWK
AWOL
AXAF
AZ
B
B8ZS
BA
BACH
BAFO
BARRNet
BASIC
BATSE
BB
BBA
BBB
BBC
BBL
BBN
BBXRT
BC
BC/BS
BCD
BCDIC
BCE
BCNU
BCP
BCPL
BCS
BD
BD&D
BDF
BDT
BE
BEF
BELCORE
BEM
BENELUX
BER
BERT
BEST
BF
BFA
BFD
BH
BHP
BICS
BID
BIMA
BIOS
BIS
BISDN
BiSync
Bit
BITNET
BLAST
BLERT
BLF
BLT
BM
BMA
BMEWS
BMO
BMOC
BMR
BNC
BNF
BO
BOC
BOD
BOF
BOM
BOOTP
BOQ
BOS
BOSIX
BP
BPI
BPL
BPOE
BPS
BR
BRA
BRI
BRIEF
BRL
BRS
BS
BSA
BSC
BSc
BSD
BSN
BSS
BSTJ
BT
BTAM
BThU
BTL
BTO
BTU
BTW
BU
BUF
BV
BWI
BX
C
C&S
C&T
C/O
CA
CAB
CACM
CAD
CAE
CAI
CAIS
CALS
CAM
CAMA
CAMP
CAP
CAR
CARE
CARP
CASE
CASSIS
CAT
CATIS
CATV
CAVU
CB
CBC
CBD
CBEMA
CBR
CBS
CBW
CC
CCA
CCAFS
CCC
CCCCM
CCCI
CCD
CCDS
CCF
CCI
CCIP
CCIRN
CCIS
CCITT
CCR
CCRI
CCRP
CCS
CCS7
CCSA
CCTA
CCTV
CD
CD-ROM
CDA
CDC
CDEV
CDIAC
CDO
CDP
CDR
CDSF
CDT
CDU
CE
CEA
CEC
CED
CELSS
CENS
CENTO
CEO
CERFnet
CERN
CERT
CEVI
CF
CFA
CFC
CFD
CFHT
CFI
CFL
CFO
CG
CG&E
CGA
CGCT
CGE
CH
CHA
CHAP
CHARA
CHI
CHOTS
CHP
CI
CIA
CIC
CICA
CICS
CID
CIDIN
CIM
CIO
CIRRIS
CISC
Cislunar
CIT
CLASP
CLASS
CLI
CLID
CLNP
CLNS
CLR
CLRC
CLU
CLUT
CM
CM
CMC
CMD
CMIP
CMIS
CML
CMMU
CMOS
CMOT
CMRR
CMS
CMSgt
CMU
CMYK
CN
CN/A
CNI
CNN
CNO
CNR
CNRI
CNRS
CNS
CNSR
CO
COB
COBE
COBOL
COC
COCOT
COD
CODEC
COER
COLA
COM
COMAS
COMM
COMPACT
COMPTEL
COMSAT
CONACYT
CONS
CORE
CORN
COS
COSINE
COSMIC
COSMOS
COSTAR
COT
CP
CPA
CPE
CPFF
CPI
CPL
CPM
CPO
CPR
CPS
CPSR
CPT
CPU
CPW
CQ
CR
CRA
CRAF
CRAM
CRC
CREG
CREN
CRRES
CRT
CRTC
CS
CSA
CSAB
CSACS
CSC
CSDC
CSF
CSI
CSIS
CSL
CSM
CSMA
CSMA/CA
CSMA/CD
CSNET
CSO
CSOC
CSP
CSR
CSRG
CSRS
CSS
CST
CSU
CT
CTC
CTD
CTIO
CTNE
CTS
CTV
CU
CUA
CUL
CV
CW
CWO
CWRU
CXI
CY
CYO
CZ
D
D&D
D/A
D/F
DA
DA/C
DA/M
DAC
DACCS
DACS
DAD
DAG
DAL
DAP
DAR
DARE
DARPA
DASD
DAT
DATA
DAV
DB
db
dba
DBF
DBME
dbms
DBRAD
DC
DCA
DCC
DCCO
DCD
DCE
DCL
DCP
DCTS
DD
DDC
DDCU
DDD
DDL
DDN
DDP
DDS
DDT
DE
DEA
DEAR
DEC
DECUS
DES
DEW
DF
DFC
DFD
DFE
DFM
DFN
DFRF
DFS
DFW
DG
DGSC
DHHS
DHSS
DIA
DIAD
DIAL
DIAS
DID
DIF
DIN
DIRE
DIS
DISA
DISOSS
DIY
DJ
DLA
DLI
DLL
DLO
DM
DMA
DMD
DME
DMF
DMOS
DMSP
DMV
DMZ
DNA
DNCRI
DNHR
DNIC
DNIS
DNL
DNR
DNS
DOA
DOB
DOC
DOD
DOE
DOHC
DOMAIN
DOS
DOT
DOT&E
DOV
DOY
DP
DPA
DPANS
DPI
DPS
DQ
DQDB
DQL
DR
DRAM
DRD
DRE
DRG
DRI
DS
DSA
DSE
DSEE
DSM
DSO
DSP
DSRI
DSS
DST
DSTN
DSU
DT
DTE
DTF
DTMF
DTP
DTR
DUI
DUT
DV
DVM
DWAPS
DWI
DWIM
DX
DXT
E
E&EO
E&M
E-MAIL
e.g.
EADASS
EAFB
EAN
EARN
EAS
EASI
EBCDIC
EC
ECAFE
ECASS
ECC
ECCM
ECDO
ECG
ECL
ECLSS
ECM
ECMA
ECO
ECPA
ECS
ECT
ECV
ED&D
EDGAR
EDI
EDIF
EDO
EDP
EDS
EDT
EDTA
EDTCC
EE
EEC
EEG
EEL
EEPROM
EFF
EGA
EGP
EGRET
EHF
EIA
EINE
EISA
EISS
EKG
EL
ELF
ELO
ELP
ELV
EM
EMA
EMACS
EMF
EMI
EMP
EMPRESS
EMR
EMS
EMT
EMU
ENIAC
ENS
EO
EOF
EOM
EOS
EOWG
EP
EPA
EPOS
EPRI
EPROM
EPS
EPT
EQ
ER
ERA
ERD
ERE
ERT
ES
ESA
ESAC
ESDI
ESE
ESF
ESM
ESnet
ESO
ESP
ESPS
ESS
ESSEX
EST
ET
ET/ACC
ETA
ETC
ETD
ETFD
ETH
ETLA
ETO
ETR
ETS
ETV
EUUG
EUV
EUVE
EVA
EVX
EW
EWOS
FA
FAA
FACD
FAO
FAQ
FAR
FAS
FASST
FAST
FAT
FAX
FB
FBI
FCC
FCCSET
FCO
FCS
FDA
FDDI
FDHD
FDIC
FDM
FDR
FE
FEA
FEDSIM
FEMA
FEMF
FEPC
FEPG
FERS
FET
FFA
FFT
FG-A
FG-B
FG-D
FGS
FHA
FIB
FICA
FIDO
FIFO
FILO
FIMS
FINE
FIO
FIPS
FIR
FIRMR
FIT
FITS
FIX
FL
FLACC
FLL
FLOP
FLOPS
FLRA
FM
FMB
FMCS
FMR
FMS
FNC
FO
FOAC
FOB
FOC
FOIA
FOIMS
FOOBAR
FOR
FORCS
FORD
FORTRAN
FOS
FOSE
FOT
FOV
FPA
FPC
FPE
FPHA
FPLA
FPM
FPO
fps
FPU
FQDN
FR
FRACTAL
FRED
FRG
FRICC
FROG
FRPG
FRS
FS
FSF
FSK
FSLIC
FSS
FSW
Ft
FTAM
FTC
FTL
FTP
FTS
FUBAR
FUSE
FW
FWD
FWHM
FX
FY
FYI
G
GA
GAAP
GAB
Gaia
GAN
GAO
GAR
GARR
GAS
GATT
GAW
GB
GBIP
GBT
GC
GCA
GCC
GCD
GCL
GCM
GCR
GCT
GCVS
GDB
GDP
GDS
GE
GEM
GEO
GHQ
GHRS
GHz
GI
GID
GIF
GIGO
GIN
GISS
GKS
GM
GMBH
GMC
GMD
GMRT
GMT
GNP
GNU
GOES
GOSIP
GP
GPC
GPI
GPIB
GPL
GPO
GPS
GQ
GRB
GREP
GRO
GRS
GS
GSA
GSBCA
GSC
GSFC
GSI
GSM
GSTS
GT
GTE
GTO
GTSI
GUI
GW
GWEN
GWM
H
HACD
HAL
HAM
HAO
Hb
HBM
HBO
HC
HCFA
HCFC
HCL
HD
HDA
HDBV
HDL
HDLC
HDTV
HE
HEAO
HEDM
HEMP
HEO
HEPnet
HERO
HF
HFE
HFS
HGA
HHS
HI
HIIPS
HLC
HLL
HLV
HMC
HMOS
HMS
HMT
HNPA
HOBIS
HOL
HOTOL
HP
HPGe
HPL/T
HQ
HR
HRH
HRI
HS
HSB
HSP
HST
HT
HTK
HUAC
HUD
HUPD
HUT
HV
HVAC
HW2000
HWM
Hz
I/O
IAB
IAEA
IANA
IATA
IAU
IAUC
IBM
IBT
IC
ICB
ICBM
ICE
ICI
ICJ
ICL
ICMP
ICP
ICRC
ID
IDA
IDDD
IDE
IDF
IDL
IDV
IE
IEC
IEE
IEEE
IETF
IF
IFB
IFC
IFF
IFLA
IFR
IGES
IGM
IGY
IHP
IHS
IIA
IIE
IIHF
IIL
ILO
ILS
ILV
IMF
IMHO
IMO
IMP
IMSL
IN
INADS
INRA
INRIA
INS
INSTITUTE
INTAP
INWATS
IO
IOC
IOD
IOOF
IOTA
IOU
IP
IPC
IPE
IPMS
IPS
IPSE
IQ
IR
IRA
IRAF
IRAS
IRBM
IRDS
IRE
IRM
IRMS
IRS
IRTF
IS
ISA
ISAM
ISAS
ISBD
ISC
ISCH
ISDN
ISDT
ISEE
ISF
ISFUG
ISI
ISM
ISO
ISODE
ISOO
ISPM
ISR
ISRG
ISV
ISY
IT
ITC
ITS
ITT
ITU
ITUSA
IUE
IUS
IUV
IXC
IXI
JACM
JANET
JBS
JC
JCA
JCAC
JCAE
JCEE
JCET
JCS
JD
JDS
JEM
JES
JET
JFK
JFMIP
JGR
JI
JIC
JILA
JIM
JINTACCS
JIS
JISC
JIT
JMS
JNT
JO
JOVE
JOVIAL
JPL
JRC
JSC
JSD
JSRC
JTIDS
JV
JvNC
JvNCnet
K
K&R
K9
KAIST
KAO
KB
KC
KD
KDCI
KERMIT
KET
KHz
KI
KIA
KIAS
Km
KO
KP
KPNO
KPO
KQC
KS
KSC
KSU
KTB
KTS
KTU
KWIC
KY
L1
L2
L3
L4
L5
LA
LADAR
LAM
LAMA
LAN
LANL
LAPB
LAPD
LAR
LaRC
LASER
LAT
LATA
LAX
LB
LBHS
LBL
LBS
LC
LCD
LCDR
LCL
LCM
LCS
LCT
LD
LDC
LDEF
LDF
LDL
LDX
LEAP
LEC
LED
LEM
LEO
LEP
LeRC
LEST
LF
LFSA
LGA
LGM
LH
LHC
LHD
LHS
LI
LIFIA
LIFO
LINC
LISA
LISP
LIU
LL
LLB
LLD
LLN
LLNL
LLO
LLOX
LLP
LM
LMC
LMOS
LN2
LNG
LOA
LOFT
LOOPS
LOP
LOSF
LOTS
LOX
LP
LPC
LPDA
LPF
LPG
LPL
LPN
LPP
LPR
LPT
LPV
LRB
LRBM
LRC
LRU
LRV
LS
LSAP
LSB
LSC
LSD
LSI
LSP
LSR
LSS
LSSD
LT
LTC
LTJG
LTL
LTP
LUG
LUT
LWM
LWT
LZ
M
m
MA
MAAP
MAC
MACSYMA
MAD
MADD
MAG
MAN
MAP
MAP/TOP
MARBI
MARC
MARS
MASC
MASER
MASH
MAST
MAT-CALS
MAU
MB
MBA
MBTA
MC
MCA
MCAE
MCC
MCP
MCP/AS
MCPO
MCSV
MD
MDAS
MDC
MDE
MDF
MDRE
MDT
ME
MECO
MEd
MERP
MeV
MF
MFA
MFJ
MFLOPS
MFM
MFS
MG
MGH
MGM
MHD
MHS
MHz
MI
MIA
MIB
MIDI
MIFASS
MILNET
MIM
MIMD
MINCE
MIPS
Mir
MIRV
MIS
MIT
ML
mL
MLA
MLD
MLL
MLS
MLV
MM
mm
MMES
MMFS
MMH
MMM
MMT
MMU
MMW
MN
MNA
MNP
MNRAS
MO
MOC
MOD
MOL
MOLA
MOMA
MOMV
MOR
MOS
MOSFET
MOTAS
MOTIS
MOTOS
MOTSS
MOTV
MOU
MOUSE
MP
MPC
MPE
MPG
MPH
MPP
MPR
MPV
MPW
MR
MRI
MRP
MRSR
MRSRM
MS
MS-DOS
MSB
MSC
MSCP
MSD
MSE
MSFC
MSG
MSH
MSL
MSPCA
MSPE
MSRP
MSS
MST
MT
MTA
MTBF
MTC
MTR
MTSO
MTTF
MTTR
MTU
MTV
MUF
MULTICS
MUMPS
MUNG
MUX
MVA
MVS
MX
N
NA
NAACP
NAAS
NAB
NABISCO
NACCIRN
NACS
NAD
NADGE
NAG
NAGE
NAK
NAM
NANP
NAPAP
NAR
NARDAC
NAS
NASA
NASDA
NASM
NASP
NATO
NAVDAC
NAVSWC
NB
NBA
NBC
NBFM
NBO
NBS
NBVM
NC
NCA
NCC
NCDC
NCE
NCGA
NCI
NCIC
NCO
NCP
NCR
NCS
NCSA
NCSC
NCTL
NCV
ND
NDA
NDDL
NDE
NDEA
NDL
NDP
NDSL
NDT
NDV
NE
NEAR
NEARnet
NEB
NEC
NEI
NES
NESC
NET
NEWS
NEXRAD
NF
NFC
NFFE
NFL
NFS
NG
NGC
NH
NHI
NHL
NHLBI
NIC
NICMOS
NIFTP
NIH
NIM
NIMH
NIMS
NIR
NIS
NISO
NIST
NJ
NJB
NL
NLM
NLP
NLRB
NLS
NM
NMOS
NMR
NMS
NNE
NNTP
NNW
NNX
NOA
NOAA
NOAO
NOC
NORAD
NORM
NORML
NOS
NOSC
NOTIS
NOW
NOx
NP
NPA
NPC
NPL
NPN
NPR
NQS
NRA
NRAO
NRC
NRE
NREN
NRL
NRO
NRZ
NRZI
NS
NSA
NSAP
NSC
NSE
NSF
NSS
NSSDC
NST
NSTS
NSW
NSWC
NT
NTEU
NTIS
NTN
NTP
NTSB
NTSC
NTT
NU
NURBS
NUSC
NV
NW
NWNET
NWS
NWT
NXX
NY
NYC
NYNEX
NYPD
NYSE
NYSERNet
NZ
NZUSUGI
OA
OAO
OAS
OATS
OBE
OBS
OC
OCDM
OCI
OCLC
OCO
OCR
OCS
OCST
OD
ODI
ODISS
ODT
OE
OED
OEM
OEO
OES
OEXP
OF
OFM
OFS
OG
OH
OIRA
OIU
OJT
OLTP
OMB
OMD
OMS
OMV
ON
ONC
ONI
ONR
OOP
OOPART
OOPS
OP
OPEC
OPF
OPM
OPUS
OR
ORFEUS
ORNL
OROM
OS
OSB
OSC
OSCAR
OSCRL
OSD
OSDIT
OSF
OSHA
OSI
OSI/RM
OSME
OSP
OSPFIGP
OSS
OSSA
OSSE
OSTP
OT
OT&LF
OTA
OTB
OTC
OTF
OTH-B
OTR
OTS
OTV
OUTWATS
OV
PA
PABX
PACCOM
PACX
PAD
PAH
PAL
PAM
PARC
PASS
PATROL
PBM
PBS
PBX
PC
PC-DOS
PC/AT
PCB
PCI
PCIE
PCL
PCM
PCPC
PCS
PCTE
PCTS
PD
PDAD
PDE
PDES
PDF
PDL
PDN
PDP
PDQ
PDS
PDT
PE
PEI
PEP
PEPE
PERL
PEX
PFC
PG
PGA
PHA
PHIGS
PHS
PhysRev Physical Review Journal
PI
PIC
PIF
PIT
PIXEL
PLA
PLATO
PLC
PLCC
PLL
PLM
PLO
PLSS
PM
PM/X
PMC
PMIRR
PMO
PMOS
PMS
PMT
PN
PNP
PO
POC
POD
POE
POGO
POM
POP
POPS
POR
POS
POSI
POSIX
POTS
POTV
POV
POW
PP
PPB
PPC
PPCS
PPM
PPN
PPP
PPS
pps
PPT
PQ
PR
PRC
PREPnet
PRI
PRN
PROFS
PROM
PS
PSA
PSC
PSDN
PSDS
PSE
PSF
PSG
PSI
PSK
PSL
PSN
PSR
PSS
PST
PSTN
PT
PTA
PTD
PTL
PTN
PTO
PTT
PTV
PUC
PV
PVC
PVO
PW
PWG
PX
q.v.
QAM
QC
QD
QDA
QED
QEF
QEI
QET
QIC
QID
QLI
QM
QMC
QMF
QMG
QMS
QNS
QSO
QWERTY
R
R&B
R&D
RA
RAAF
RACE
RACEP
RAD
RADAR
RADM
RAF
RAM
RARDE
RARE
RAS
RASC
RATS
RBC
RBI
RBOC
RC
RCA
RCAF
RCAS
RCC
RCMP
RCS
RD
RDA
RDBMS
RDF
REA
RECON
REM
REO
REXX
RF
RFC
RFD
RFI
RFP
RFQ
RFS
RGB
RGP
RH
RHC
RHS
RI
RIACS
RIAS
RIF
RILM
RIP
RIPE
RISC
RITA
RJE
RLC
RLG
RLIN
RLL
RMA
RMATS
RMS
RN
RNA
RNGC
RNZAF
ROFF
ROG
ROM
ROSAT
ROSE
ROTC
ROTS
ROYGBIV
RPC
RPG
RPI
RPM
RPN
RPO
RPS
RPV
RQ
RR
RRO
RS
RSCS
RSFSR
RSN
RSU
RSV
RSVP
RSWC
RT
RTA
RTAC
RTF
RTFM
RTG
RTLS
RTR
RTS
RTTY
RU
RVD
RW
RX
Ry
S
S&C
S/C
SA
SAA
SAC
SADD
SAFENET
SAM
SAMA
SAMPEX
SAMTO
SAO
SAP
SAR
SARA
SAREX
SARTS
SAS
SASE
SASI
SAT
SAW
SBA
SC
SCA
SCAD
SCADC
SCAME
SCAMP
SCAN
SCC
SCCS
SCE
SCI
SCIFI
SCO
SCOOPS
SCOTS
SCSI
SCT
SCUBA
SCUD
SD
SDB
SDI
SDIO
SDLC
SDM
SDN
SDO
SDSC
SDV
SE
SEATO
SEC
SECNAV
SED
SEI
SEL
SEM
SEST
SETI
SF
SFRPG
SG
SGML
SHAPE
SHAR
SHCD
SHF
SHRPG
SI
SIAM
SID
SIG
SIGCAT
SIMD
SIMM
SINE
SIPS
SIR
SIRTF
SIS
SISCOM
SITA
SJ
Skyhook
SL
SLA
SLAC
SLAN
SLAR
SLBM
SLC
SLDC
SLIP
SLP
SLS
SM
SMA
SMC
SMD
SMDR
SMDS
SME
SMEGMA
SMERSH
SMEX
SMILS
SMM
SMTP
SMU
SN
SNA
SNADS
SNAFU
SNAP
SNCF
SNF
SNMP
SNOBOL
SNPA
SNR
SNU
SO
SOAP
SOFIA
SOH
SOHIO
SOHO
SOL
SONAR
SONET
SOP
SOS
SP
SPA
SPAG
SPAN
SPAR
SPARC
SPAWAR
SPC
SPCA
SPCC
SPDM
SPEC
SPITBOL
SPNI
SPOT
SPS
SPUR
SQIID
SQL
SQUID
SRAM
SRB
SRG
SRI
SRM
SRO
SS7
SSA
SSB
SSC
SSE
SSF
SSFF
SSG
SSI
SSME
SSPF
SSPS
SSR
SSRMS
SST
SSTO
SSTV
SSW
ST
STARS
STD
STI
STILO
STIS
STL
STN
STOL
STP
STRPG
STS
STScI
STV
SUM
SUN
SUNOCO
SUNY
SURAnet
SVID
SW
SWAS
SWBT
SWF
SWIFT
SWS
SXS
T
T&T
T1
T3
TA
TAC
TACACS
TACCS
TAE
TAL
TANSTAAFL
TAR
TASI
TAU
TB
TBA
TBD
TC
TCA
TCP
TCP/IP
TCS
TCSEC
TCT
TD
TDCC
TDE
TDI
TDM
TDR
TDRS
TDRSS
TDY
TECO
TEFLON
TES
TFP
TFS
TFT
TG
TGV
THIEF
THOR
TI
TIA
TIC
TID
TIFF
TIP
TIS
TISN
TKO
TL
TLA
TLC
TLI
TM
TMA
TMAC
TMIS
TMO
TMP
TMRC
TN
TNC
TNF
TNP
TNT
TO
TODS
TOMS
TOOIS
TOP
TOPLAS
TOPS
TOPSMP
TORES
TOS
TOW
TOY
TP
TP4
TPC
TPI
TPO
TPP
TPS
TR
TRG
TROFF
TRUSIX
TRW
TS
TSAP
TSD
TSP
TSR
TSS
TSTO
TTFN
TTL
TTMA
TTU
TTY
TUNIS
TV
TVA
TW
TWA
TWB
TWIMC
TWT
TWX
TX
Tx
U
u
UA
UAR
UARS
UART
UBA
UBC
UBM
UCAR
UCB
UCD
UCI
UCL
UCLA
UCR
UCSB
UCSC
UCSD
UCSF
UDB
UDMH
UDP
UEC
UFO
UGC
UH
UHF
UID
UIMS
UIT
UIUC
UK
UKST
UL
ULANA
UMOC
UMT
UN
UNESCO
UNICEF
UNICS
UNIX
UNMA
UNO
UP
UPC
UPI
UPS
UR
URI
US
USA
USAF
USAFA
USAN
USB
USC
USCG
USDA
USES
USFL
USGS
USIA
USM
USMC
USMP
USN
USO
USP
USPS
USR
USS
USSR
USSS
USW
UT
UTC
UTnet
UTP
UUCP
UUG
UV
UVS
UW
V&H
V&V
VA
VAB
VAFB
VAN
VANS
VAR
VASI
VAT
VAX
VAXBI
VC
Vcc
VCM
VCO
VCR
VCU
VD
VDFM
VDI
VDM
VDT
VEEGA
VF
VFO
VFR
VFW
VG
VGA
Vgg
VHDL
VHF
VHS
VHSIC
VI
VIABLE
VILE
VINE
VIP
VISTA
VITA
VJ
VL
VLA
VLBA
VLBI
VLF
VLIW
VLSI
VLT
VM
VM/CMS
VMM
VMOS
VMR
VMS
VOA
VOIR
VOIS
VOQ
VPI&SU
VRC
VRM
VSAT
VSX
VTAM
VTOC
VTOL
VTR
VUP
VVSS
W
WA
WAC
WAIS
WARC
WATS
WB
WBC
WC
WCTU
WD
WECo
WFPC
WFPCII
WG
WH
WHBL
WHCA
WHO
WI
WIMP
WIPP
WIS
WITS
WIYN
WMSCR
WOM
WOP
WOPR
WORM
WOW
WP
WPI
WSI
WSMR
WSW
WTR
WU
WUPPE
WV
WW
WWI
WWII
WWMCCS
WY
WYSIWIS
WYSIWYG
XCF
XD
XDR
XFER
XINU
XL
XMM
XMTR
XNS
XO
XOR
XPORT
XSECT
XTAL
XUI
XUV
YA
YACC
YB
YMCA
YMHA
YOB
YP
YRS
YSO
YST
YT
YTD
YWCA
YWHA
Z
ZB
ZETA
ZGS
ZI
ZIF
ZIP
ZK
ZMRI
ZPG
ZPRSN
ZST
ZT
ZWEI