Abell    - George Abell (planetary nebulae and galaxy clusters)
ADS      - Aitken Double Star catalog
AM       - Arp-Madore (globular clusters)
Antalova - (open clusters)
Ap       - Apriamasvili (planetary nebulae)
Arp      - Halton Arp (interacting galaxies)
Bark     - Barkhatova (open clusters)
B        - Barnard (dark nebulae)
Basel    - (open clusters)
BD       - Bonner Durchmusterung (stars)
Berk     - Berkeley (open clusters)
Be       - Bernes (dark nebulae)
Biur     - Biurakan (open clusters)
Blanco   - (open clusters)
Bochum   - (open clusters)
Ced      - Cederblad (bright nebulae)
Cr       - Collinder (open clusters)
Czernik  - (open clusters)
DDO      - David Dunlap Observatory (dwarf galaxies)
Do       - Dolidze (open clusters)
DoDz     - Dolidze-Dzimselejsvili (open clusters)
Dun      - Dunlop (globular clusters)
Fein     - Feinstein (open clusters)
Frolov   - (open clusters)
Gum      - (bright nebulae)
H        - William Herschel (globular clusters)
Haffner  - (open clusters)
Harvard  - (open clusters)
He       - Henize (planetary nebulae)
Hogg     - (open clusters)
HP       - Haute Provence (globular clusters)
Hu       - Humason (planetary nebulae)
IC       - 1st and 2nd Index Catalogs to the NGC (All types of objects except dark nebulae)
Isk      - Iskudarian (open clusters)
J        - Jonckheere (planetary nebulae)
K        - Kohoutek (planetary nebulae)
King     - (open clusters)
Kr       - Krasnogorskaja (planetary nebulae)
Lac      - Lacaille (globular clusters)
Loden    - (open clusters)
LDN      - Lynds (dark nebulae)
Lynga    - (open clusters)
M        - Messier (all types of objects except dark nebula)
MCG      - Morphological Catalog of Galaxies
Me       - Merrill (plantary nebulae)
Mrk      - Markarian (open clusters and galaxies)
Mel      - Melotte (open clusters)
M1 to M4 - Minkowski (planetary nebulae)
NGC      - New General Catalog of Nebulae & Clusters of Stars (All types of objects except dark nebulae)
Pal      - Palomar (globular clusters)
PC       - Peimbert and Costero (planetary nebulae)
Pismis   - (open clusters)
PK       - Perek & Kohoutek (planetary nebulae)
RCW      - Rodgers, Campbell, & Whiteoak (bright nebulae)
Roslund  - (open clusters)
Ru       - Ruprecht (open clusters)
Sa       - Sandqvist (dark nebulae)
Sher     - (open clusters)
Sh       - Sharpless (bright nebulae)
SL       - Sandqvist & Lindroos (dark nebulae)
SL       - Shapley & Lindsay (clusters in LMC)
Steph    - Stephenson (open clusters)
Stock    - (open clusters)
Ter      - Terzan (globular clusters)
Tombaugh - (open clusters)
Ton      - Tonantzintla (globular clusters)
Tr       - Trumpler (open clusters)
UA       - Catalog of selected Non-UGC galaxies
UGC      - Uppsala General Catalog (galaxies)
UKS      - United Kingdom Schmidt (globular clusters)
Upgren   - (open clusters)
VV       - Vorontsov-Velyaminov (interacting galaxies)
vdB      - van den Bergh (open clusters, bright nebulae)
vdBH     - van den Bergh & Herbst (bright nebulae)
vdB-Ha   - van den Bergh-Hagen (open clusters)
Vy       - Vyssotsky (planetary nebulae)
Waterloo - (open clusters)
Westr    - Westerlund (open clusters)
Zw       - Zwicky (galaxies)