last place; lowest position; lowest rank; least significant (bit); lowest order
upward compatible; forward compatible; downward compatible; backward compatible; providing the same function while being less effective (esp. in games)
person of low rank or position
bottom of the (batting) order
upward compatibility; forward compatibility; compatibility with input or components intended for higher tier or later systems, versions, etc.; downward compatibility; backward compatibility; compatibility with input or components intended for lower tier or older systems, versions, etc.
subcategorization; subcategorisation