Microsoft
A lower case e
The logo with a lowercase "f" inside a box refers to the Facebook logo.
Accenture
Accenture?
The answer when typing the abbreviation for a fost to company should be typed in a lower case.
Look for the eSATA logo next to it. The eSATA logo looks exactly the same as the SATA logo, except that it has the lower case "e" before it.
White lower case letters "abc" inside a black circle.
IBM
The rounded upper and lower looking "H" logo is actually an "U" over an "A" which is Under Armour's logo. Under Armour is a sportswear company
Possibly the Monica - see http://www.purplehell.com/riddletools/carlogos.htm
what company has abraviation bv as logo