acg ARCIS_GEOPHYSICAL
acp ARCIS_PROCESSING
acs ARCIS_SURVEYS
adl ADLER_SEISMIC
adm ASHLEYS_DATA_MANAGEMENT
ads ADVANCED_DATA_SOLUTIONS
adv ADVANCE_GEOPHYSICAL_CORP
aec ALBERTA_ENERGY_CO_LTD
aesl ALL-CAN_ENGINEERING_AND_SURVEYS_(1976)
afsl AFFINITY_GEOPHYSICAL_SERVICES_LTD
agllc ARANSAS_GEOPHYSICS_LLC
ags AGESCO
agso AUSTRALIAN_GEOLOGY_SURVEY_ORGANIZATION
ah AMERADA_HESS_CORP
ak A_K_GEOPHYSICAL_LTD
alg ALGLOW_EXPLORATION_LTD
am AMOCO_CANADA_PETROLEUM_LTD
amg AMERICAN_GEOPHYSICAL_CO
apc APACHE_ENERGY
aqt AQUATERREX_LTD
ar ATLANTIC_REFINING_CO
arab ARABIAN_GULF_OIL_COMPANY
arag ARAB_GEOPHYSICAL_EXPLORATION
arch ARCHIVEX
arcn ARCON_(ALTANTIC_RICHFIELD_CO)
aro AEROPULSE_EXPLORATION_SERVICES_LTD
arte ARCTIC_EXPLORATION
asc ASCENTEX_ENERGY_INC
ascs ASC_SYSTEMS_INC
asl ALLIED_SEISMIC_LTD
asp APOTERRA_SEISMIC_PROCESSING
atra ATRA_GEO_SERVICES_LTD
ats SURVEYAUDIT
aust GEOPHYSICAL_BRANCH_-_GOVT_OF_AUSTRALIA
axs AXIS_GEOPHYSICS
ba BRITISH_AMERICAN_OIL_CO_LTD
bac BA_NO_30
bg BEAVER_GEOPHYSICAL_SERVICES_LTD
bgp BGP_OIL_AND_GAS_SERVICES_LLC
bgpi BGP_INTERNATIONAL
bhi BAKER_HUGHES_INCORPORATED
blc BLUE_CASTLE_CORPORATION
bnc BALL_AND_COLLINS_LTD
boco BULGARIAN_OIL_COMPANY
bogo BOGOTA_(ECUADOR)
bp BRITISH_PETROLEUM_COMPANY_LTD
bpcs BP_CHARTER_SEISMIC
bpel BP_EXPLORATION_LIBYA_LTD
cagl CANADIAN_ANALOG_LTD
cal CALISTO_OILS_LTD
can CANTERRA_ENERGY_LTD
cap CAPILANO_GEOPHYSICAL_LTD
car CARAVEL_EXPLORATIONS_LTD
cat CATALINA_EXPLORATION_AND_DEV_LTD
cce CONCOMITTANT_ENTERPRISES_LTD
cdp COMPUTER_DATA_PROCESSORS_LTD
cdx CENTRAL_DEVELOPMENT_EXPLORATION_LTD
ce CUBE_ENERGY
cej CEJA_CORPORATION
cer CHANCELLOR_ENERGY_LTD
cgg CGG_GEOPHYSICS_CANADA_LTD
cgl COMPUTALOG_GEARHART_LTD
cgs CLARION_GEOPHYSICAL_SERVICES
ch CHEVRON
chgd CHEVRON_OIL_GEOPHYSICAL_DIV_HOUSTON
chn CHAMPLIN_PETROLEUM_CO
cis CANEX_INFORMATION_SERVICES
clb COLBY_RESOURCES_LTD
cmr CANADIAN_MAGNETIC_REDUCTIONS
cnc C_AND_C_SYSTEMS
cnel CENTURY_EXPLORATION_LTD
cno CONOCO_NORTH_SEA_INC
com COMMONWEALTH_EXPLORATION
comd COMDISCO_CANADA_LTD
comg COMMONWEALTH_GEOPHYSICAL
con CONTINENTAL_OIL_LTD
cooi CANADIAN_OXY_OFFSHORE_INTERNATIONAL_LTD
cop COPYSEIS_LTD
coph CONOCOPHILLIPS
core CORELAB
cpc CLIVEDEN_PETROLEUM_CO_LTD
cqss CONQUEST_SEISMIC_SERVICES
crn CRITERION_EXPLORATION_INC
cro CROCKER_DATA_PROCESSING
cs CANADIAN_SUPERIOR_OIL_LTD
csc CALIFORNIA_STANDARD_COMPANY
csg CANADIAN_STRUCTURAL_GEOPHYSICS_LTD
csi CANGEO_SYSTEMS_INC
csm COLORADO_SCHOOL_OF_MINES
ct COHERENCY_TECHNOLOGIES
cw CANWEST/OLYMPIC_DRESSER
cx CANEXCO_SURVEYS_LTD
czn CURZON_EXPLORATION_LTD
da DRESSER_ATLAS_(DIV_OF_DRESSER_CANADA)
dat DATAGRAPHICS_ALBERTA_LTD
dcc DATA_COMPUTING_CORP
dds DYAD_DATA_SERVICES_LTD
de DEVON_ENERGY
dei DELTA_EXPLORATION_INC_INDONESIA
del DELTA_EXPLORATION_INC
dex DIGITAL_EXPLORATION_LTD
dga DIGICON_GEOPHYSICAL_CORP_AUSTRALIA
dgep DIRECTION_GENERALE_EXPL_PROD
dgi DYNAMIC_GEOPHYSICAL_INC
dgs DIGICON_SINGAPORE
di DIGICON_EXPLORATION_LTD
dig DIAMOND_GEOPHYSICAL_SERVICES_INC
dlf DELFT_GEOPHYSICAL
dm DATA_MANAGEMENT_AS
do DRESSER_OLYMPIC_(CANADA)_DIVISION
dome DOME_PETROLEUM_LIMITED
dong DONG_EFTERFORSKNING
dp DATA_POINT_SEISMIC
dpi DENVER_PROCESSING_CENTRE_INC
dpt DPTS_INC
dpts DPTS_UK
dss DIGITAL_SEISMIC_SERVICES_LTD
dst DATASPAN_TECHOLOGY_LTD
dtc DIGITECH_LTD
dtk DATA_TREK_LTD
dtr DYNA-TRACE_REDUCTION_AND_PROCESSING_LTD
e EXSSEL
ea EXPLOR-ALTA_LTD
ecc ENCANA_CORPORATION
eci EXPLORATION_CONSULTANTS_INC
edt EDGE_TECHNOLOGY
eg ENERTEC_GEOPHYSICAL_LTD
egs EXCEL_GEOPHYSICAL_SERVICES
ei ELNUSSA_ISSA
elfa ELF_AQUITAINE
elg ELGIN_EXPLORATION_LTD
emvz EMVANEFTEGEOFIZIKA
enc ENCOM_TAPE_SERVICES
epd EXPLOR_DATA_LTD
epi E-PI_ENTROPIC_GEOPHYSICAL
epic EXPLORATION_AND_PRODUCTION_IMAGING_CORP
es EARTH_SIGNAL_PROCESSING_LTD
esl EAGLE_SURVEYS_LTD
esn ENSIGN_GEOPHYSICS_LTD
esp ECLIPSE_SEISMIC_PROCESSORS
ess EXPLORATION_SEISMIC_SERVICES_LTD
esso ESSO_RESOURCES_(CANADA)_LTD
ets ENVIRO-TECH_SURVEYS_LTD
eur EUREKA
exg EXCALIBUR_GEMINI
exi EXPLORATION_INNOVATIONS_INC
exne EXXONMOBIL_EXPLORATION_COMPANY
ext EXTECH_SURVEYS_INC
fa FARNEY_EXPLORATION_CO_LTD
fas FUGRO_AIRBORNE_SURVEYS
fbs FIRST_BREAK_STATICS
fel FASTWAY_EXPLORATION_LTD
ffi FAIRFIELD_INDUSTRIES
fgl FRONTIER_GEOPHYSICAL_LTD
fguk FUGRO_(UK)
fina FINA_EXPLORATION_LIBYA_BV
fmc FUGRO_MULTI_CLIENT_SERVICES
for FOREST_OIL_CORP
fut FUTURE_EXPLORATION_LTD
fwi 4TH_WAVE_IMAGING
gax GEOPHYSICAL_ASSOCIATES_LTD
gcia GEOCENTER_INC_(AUSTRALIA)
gcinc GEO_CONCEPTS_INC
gcl GLEICHEN_CORPORATION_LTD
gcon GEOPHYSICAL_CO_OF_NORWAY
gd GEODIGIT
gdp GEOPHYSICAL_DATA_PROCESSING_CENTER_LTD
gds GUARDIAN_DATA_SEISMIC
geci GEOCO_(INDONESIA)
geco GECO
ged GEOCAN_EXPLORATION_AND_DEVELOPMENT_LTD
gedc GEOPHYSICAL_EXPLORATION_AND_DEVELOPMENT
gen GEONAUTICS_LTD
geo GEOSOURCE_INC
geol GEOSOLUTIONS_CORPORATIONS
get GEOTERREX_LTD
geus GEUS
gf GEOFAX_SURVEYS
ggc GRANT_GEOPHYSICAL_CORP
ggi GENERAL_GEOPHYSICAL_CO_INC
gh GALE_HORIZONS_LTD
gi GEOCOM_INDONESIA
gld GOLDEN_GEOPHYSICAL_LTD
gni GRANT_NORPAC_INC
goi GENERAL_OCEANOGRAPHICS_INC
gom GEOTEAM__A/S_(UK)
gox GEO-X_SYSTEMS_LTD
gp GECO-PRAKLA
gpc GEO-PHYSI-CON_LTD
gps GEOPHOTO_SERVICES_LTD
grd GULF_RESEARCH_AND_DEVELOPMENT_USA
grv GREVILLE_SEISMIC_(AUST)
gs GEOSIGNAL_EXPLORATION_LTD
gsav GEOPROS_SA_VENEZUELA
gsc GEOLOGICAL_SURVEY_OF_CANADA
gsi GEOPHYSICAL_SERVICE_INC
gss GENESIS_SEISMIC_SERVICES
gti GEOSCOPE_EXPLORATION_TECHNOLOGIES_INC
gtk GEOTEK_SEISMIC_SURVEYS
gtr GEO_TRACE
gts GTS_CORPORATION
gtst GTS-TEKNICA_INC
gtuk GEOTEAM
gulf GULF_OIL
gus GLOBE_UNIVERSAL_SCIENCES_CANADA_LTD
gx GX_TECHNOLOGY
hal HALIBURTON_GEOPHYSICAL_INC
hbog HUDSON_S_BAY_OIL_AND_GAS_CO_LTD
hgm HAYS_GEOMASTER
hgs HGS_INC
hne HORIZON_NUSANTARA_EKSPLORA
ho HOUSTON_OILS_LTD
home HOME_OIL_CO_LTD
hpe HEPBURN_EXPLORATION
hsa HORIZON_SEISMIC_AUSTRALIA
hsc HUNTING_SURVEY_CORP_LTD
ht HI-TECH_EXPLORATION_SERVICES_LTD
hx HEILAND_EXPLORATION_LTD
hyg HRYHOR_GEOPHYSICAL_LTD
hzn HORIZON_EXPLORATION_LTD
ids INTERGRATED_DATA_SERVICES
igc IGC_GEOSCIENCES_CONSULTING_LTD
igs INTEGRA_GEOPHYSICAL_SERVICES
iit IMAGE_INTERPRETATION_TECHNOLOGIES
imp IMPERIAL_OIL_LIMITED
ips INTERPHASE_SEISMIC_LTD
ita INVERSE_THEORY_AND_APPLICATIONS_INC
its INTERACTIVE_TECHNICAL_SERVICES_LTD
ja JAN_SEISMIC
jad JADE_EXPLORATION
jbc JEBCO
jgi JUST_GEO_INC
jgs JASON_GEO-SYSTEMS
js JELINEK_SURVEYS
ka KELMAN_ARCHIVES
kdl KESTREL_DATA_LTD
kods KANSAS_OVATION_DATA_SERVICES
kp KP_SEISMIC_CANADA_LTD
ksp KELMAN_SEISMIC_PROCESSING
kss KEY_SEISMIC_SOLUTION_LTD
las LASMO_CANADA_LTD
lba LIBYA
lct LCT_HOUSTON_INC
ldc LONDON_DIGITAL_CENTRE
lit LITHOPROBE_SEISMIC_PROCESSING_FACILITY
lmk LANDMARK_CALGARY_ALBERTA
lsat LANDSAT_SATELLITE
lyk LYNX_INFORMATION_SYSTEMS_LTD_(UK)
lyx LYNX_CANADA_INFORMATION_SYSTEMS_LTD
mag MAGNETRACE
mao MAERSK_OIL_OMAN_AS
mcx MCCONNELL_EXPLORATION_SURVEYS_LTD
meps MOBIL_E_AND_P_SERVICES_INC
mer MERLIN_PROFILERS_(UK)
mes ME_SWAB_HOLDINGS_LTD
mic MICRON_RESOURCES_LTD
mm MANDREL_MARINE
mob MOBIL_OIL_CANADA_LTD
mogs MOBIL_OIL_CORP_EXPLORATION_SERVICES
mtgs MATRIX_GEOSERVICES_LTD
mts MARINE_TECHNICAL_SERVICES_LTD
nagc NORTH_AFRICIAN_GEOPHYSICAL_COMPANY
nat NATIONAL_GEOPHYSICAL_LTD
nco NARCO
ne NEWTON_EXPLORATION
neo NEOTECH_INC
ng NORTHERN_GEOPHYSICAL_LTD
ngr NGR_SERVICES
ngs NORTHERN_GEOSERVICES_(1986)_LTD
nld NETHERLANDS
nor NORCANA_EXPLORATION_LTD
npc NOPEC_(UK)
npcc NORPAC
nrg NRG_SERVICES
nri NRI_ON-LINE_INC
nrx NOREX_GEOPHYSICAL
nwe NATIONWIDE_EXPLORATION_LTD
nx NOREX_EXPLORATION
odp OIL_DATA_PROCESSORS_LTD
ods OVATION_DATA_SERVICES
oeb OCCIDENTAL_ECUADOR
oes OVERLAND_EXPLORATION_SERVICES_(1969)_LTD
ogs OSSERVATORO_GEOFISICO_SPERIMENTALA
ogo OPEN_GEO_SOLUTIONS
oly OLYMPIC_SEISMIC 
omv OMV_(CANADA)_LTD
ongc ONGC_INDIA
opt OPTICAL_DATA_SYSTEMS_INC
ova OVATION_DATA_SERVICES_INC
oxy OCCIDENTAL_PETROLEUM_LTD
pacp PACIFIC_PETROLEUMS_LTD
par PARAMOUNT_RESOURCES
pcl PACIFIC_COPY_LTD
pcn PETROLEUM_EXPLORATION_CONSULTANTS_NOPEC
pcp PANCANADIAN_PETROLEUM_LTD
pcr PACER_GEOPHYSICAL_LTD
pda PETREX_DATA_AGENCIES
pdm PT_DIGICON_MEGA_PRATAMA
pdo PETROLEUM_DEVELOPMENT_OMAN
pdp PT_DWIPANTARA_PERDANA
pds PECC_DATA_SERVICES
peb PETROBRAS_INTERNATIONAL
pel POLARIS_EXPLORER_LTD
per PETREL
pet PETREL_CONSULTANTS_LTD
pfs PROFILE_SEISMIC_LTD
pg PARADIGM_GEOPHYSICAL
pgsn PGS_NOPEC
ph PHILLIPS_PETROLEUM_COMPANY
phgr PHOTOGRAVITY_SURVEYS_LTD
pinn PINNACLE_GEOPHYSICAL_LTD
pk PRAKLA_SEISMOS
pnam PAN_AMERCIAN_PETROLEUM_CORP
pr PETTY-RAY_GEOPHYSICAL_INC
prak PRAKLA-SEISMOS
psp PRECISION_SEISMIC_PROCESSING
ptgi PT_GECO_INDONESIA
ptj PT_PANAH_TERARAH_JAYA
ptmd PT_MATRA_DELTA
pty PETTY_GEOPHYSICAL_ENGINEERING_CO
pul PULSONIC_GEOPHYSICAL_LTD
pv PHOENIX_DELTA_VENTURE
pvl PETROVENTURES_LTD
qdo QUEDCO_EXPLORATION_LTD
qrc QUESTAR_RESOURCES_CORPORATION
qs QUESTOR_SURVEYS
qua QUALITY_DATA_SERVICES_LTD
ray RAY_GEOPHYSICAL_LTD
rb RB_CRUZ_AND_ASSOCIATES_LTD
res RESMAN_OIL_AND_GAS
ress RESOLUTION_SEISMIC
ro RANGER_OIL_LIMITED
roc RICHFIELD_OIL_CORPORATION
rral ROBERTSON_RESEARCH_AUSTRALIA_LTD
rsp RILEYS_SEISMIC_PROCESSORS
rtr REEL_TO_REEL_DATA_SERVICES
s64 SEISMOTECH_64_LTD
sai SEONEX/AERODAT_INC
san SANDER_GEOPHYSICAL_LTD
saus SEISMIC_AUSTRALIA
sbr SABRE_PETROLEUMS_LTD
sc STATCOM_LTD
sca SHELL_CO_OF_AUSTRALIA
scc SEISMIC_COMPUTING_CORP_INDONESIA
scch SEISMIC_COMPUTING_CORP_HOUSTON_TX
sch SCHLUMBERGER_OF_CANADA
scha SCHLUMBERGER_GECO-PRAKLA_AUSTRALIA
scht SCHLUMBERGER_GECO-PRAKLA_TUNISIA
scp SCOTT_PICKFORD
scpi SEISCRAFT_PROCESSING_INC
sd SEISCOM-DELTA_UNITED_(CANADA)_LTD
sdi SEISCOM_DELTA_INDONESIA
sdp SEISMIC_DATA_PROCESSORS_LTD
sea SEA_HAWK_RESOURCES_LTD
seg SEFEL_J_AND_ASSOCIATES_LTD
segc SPECTRA_EXPLORATION_GEOSCIENCE_CORP
sei SEISMIC_EXPLORATION_INTERNATIONAL
seis SEITEL_SOLUCTIONS
sel STRATASEIS_EXPLORATION_LTD
sep SEISMIC_PROFILERS
sepi SEIS_PRO_INC
sepl SAMIT_ENTERPRISES_PVT_LIMITED_(INDIA)
seq SEISQUEST
set SIGNAL_ESTIMATION_TECHNOLOGY_INC
seu SEARCH_(UK)
sgc SHEARWATER_GEOPHYSICAL_CORPORATION
sgl SENSOR_GEOPHYSICAL_LTD
sgr SEISMIC_GRAPHIC_REPRODUCTIONS_LTD
sh SHELL_CANADA_RESOURCES_LTD
shn SHEENAN_EXPLORATION_COMPANY
sig SIGMA_EXPLORATION_LTD
sign SIGNATURE_SEISMIC_PROCESSING_INC
sios SEISMIC_IMAGE_OPTICAL_SERVICES
sip SEISMIC_IMAGE_PROCESSING_LTD
sit SPECTRUM_ENERGY_TECHNOLOGY_INC_TX
sj SJ_INVERSION_TECHIQUES
sls SEISLAND_SURVEYS
smng SMNG_(TEMP)
sna S_AND_A_GEOPHYSICAL_LTD
soc SHENANDOAH_OIL_CORP
soce SOCONY-VACUUM_EXPLORATION_CO
sp SULPETRO_OF_CANADA_LTD
spc SEIS-PRO_CONSULTANTS_LTD
spe SEISPORT_EXPLORATION_LTD
spt SIMON_PETROLEUM_TECHNOLOGY_LTD
sqp SOQUIP
sri SEISMIC_RESOURCES_INC
ss SOLID_STATE_EXPLORATION_LTD
ssc SEISMOGRAPH_SERVICE_CORP
ssel SEISMOGRAPH_SERVICE_(ENGLAND)_LIMITED
ssl SEISMIC_SERVICE_LTD
ssltd SAHARA_SEISMIC_LTD
ssp SPECTRUM_SEISMIC_PROCESSING_CENTRES_LTD
st SEIS-STAR_GEOPHYSICAL_LTD
stc SEISTECH_LTD
stgi STRATSEIS_GEOPHYSICAL_INC
stm STM_CORPORATION
sun SUN_OIL_COMPANY_LTD
sx SOURCEX_GEOPHYSICAL_LTD
ter TERRASCAN_EXPLORATION_LTD
tex TEXACO_EXPLORATION_CANADA_LTD
tgc TEXACO_INC_GEOPHYSICAL_CENTER
tgsi TGSINTERNATIONAL
tgsn TGS_NOPEC
tls TALISMAN_ENERGY_INC
tmt TRANSMEDIA_TECHNOLOGIES
totn TOTAL_PETROLEUM_NORTH_AMERICA_LTD
tszk TRUST_SEVMORNEFTEGEOFIZIKA
tt TAPE_TECHNOLOGY
tts TELETAPE_SERVICES_LTD
tul TULSA_PROCESSING_GROUP
txl TELEDYNE_EXPLORATION_LTD
ukn UNKNOWN
uo UNION_OIL_COMPANY_CANADA_LTD
uoc UNION_OIL_CO_OF_CANADA_LTD
upr UNION_PACIFIC_RESOURCES_INC
usgs US_GEOLOGICAL_SURVEY
usr USSR_MINISTRY_OF_GEOLOGY
utt ULTERRA_TECHNOLOGIES
vari VARIDATA_SYSTEMS
vdsp VECTOR_DATA_SEISMIC_PROCESSING_INC
vec VECTOR_TECHNOLOGY_LTD
ver VERITAS_GEOPHYSICAL_LTD
vs VELOCITY_SURVEYS_LTD
vx VIBRO-X
vye VYE_EXPLORATION_LTD
wai WESTERN_ATLAS_INTERNATIONAL
wdx WARD-X_DATA_SERVICES_LTD
wei WASCANA_ENERGY_INC
weid WESTERN_ENDEAVOUR_INDONESIA
wg WESTERN_GECO
wgc WESTERN_GEOPHYSICAL_(CANADA)
wgd WESTERN_GEO-DATA_LTD
wgi WESTERN_GEOPHYSICAL_ITALY
wgia WESTERN_GEOPHYSICAL_INDONESIA
wgs WORLD_GEOSCIENCE
wgv WESTERN_GEOPHYSICAL_VENEZUELA
wre WILD_ROSE_EXPLORATION_SERVICES_LTD
wshll WINTERSHALL_AG
wsl WORLDWIDE_SURVEYS_LTD
wuk WESTERN_GEOPHYSICAL_(UK)
wus WESTERN_GEOPHYSICAL_USA
ypf YACIMIENTOS_PETROLIFEROS_FISCALES