sbd

As abbreviations the difference between std and sbd

is that std is standard, usually Std or std while sbd is alternative form of sbd.|lang=en.

As a noun STD

is subscriber trunk dialing / subscriber toll dialing.

As an initialism SBD is

silent but deadly (an inaudible but extremely odorous gaseous excretion, a silent but smelly fart.

As a noun taxonomy

is the science or the technique used to make a classification.

As an abbreviation sbd is

.