Blade connector, commonly found in cars for quick connection of wiring to electrical components
IEC 60309 (BS 4343), so-called "Commando" plug and socket
Molex connector, four-pin hard disk drive (HDD) connectors, also used for powering CD-ROM drives, burners etc.
Berg connector, smaller four pin floppy disk drive (FDD) connectors, also used by some hard drives, and carrying the same power supplies as the HDD connectors
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