A thread on Russian Bombs.... Nomenclature used on Russian Bombs could be confusing even for fighter pilots who drop them regularly. Here's a thread on some basics....
Most Russian bomb nomenclatures would have AB embedded in it. eg: FAB, OFAB, ODAB, BetAB, KAB etc. AB stands for Avia Bomba which translates to Aerial Bomb. 
FAB is a commonly used dumb bomb and stands for Fugahsnaya Avia Bomba or High Explosive Bomb. An OFAB on the other hand is Oskolochno Fugasnaya Avia Bomba or Fagmentation HE Aerial Bomb
OD stands for Omno-Detoneeruyushchaya or Volume Detonation. These arce basically fuel/ air explosives creating large volume of explosion. OD can either be prefixed like in ODAB or suffixed like in KAB-500 OD.
KAB stands for Korrekteeruyemaya Avia Bomba or Corrected Aerial Bomb. As the name signifies, aerial corrections are given to the bomb making it guided.
BetAB or Betonobojnaja Aviacionnaja bombs are Concrete Piercing retarded/ rocket assisted runway cratering bomb
Few additions: SAB or Svetyashchaya AviaBomba are Flare Bombs used to illuminate targets. ShOAB (the Bomb and not the cricketer) is Sharikovaya Oskolochnaya Avia Bomba which means Pellet Bombs or Bomblets.
OMAB is not to be confused with MOAB and stands for Oryenteerno Markernaya Avia Bomba or Maritime Marker Aerial Bomb
Thanks to @zone5aviation for reminding. ZAB is
Zazhigahtel'naya Avia Bomba or incendiary bomb. And of course there is the OFZAB, which is a combination of OFAB and ZAB making it a Fragmentation, HE and Incendiary Bomb.
Zazhigahtel'naya Avia Bomba or incendiary bomb. And of course there is the OFZAB, which is a combination of OFAB and ZAB making it a Fragmentation, HE and Incendiary Bomb.
