Computers need to be able to represent negative numbers as well as positive numbers and thats where signed binary helps. One possible way to sign binary numbers is using two's complement.

ECE-University-Notes / Semester 3 / COE 328 - Digital Systems / Course Information / Fundamentals of Digital Logic with VHDL Design (3rd Edition) - Stephen Brown, Zvonko Vranesic.pdf Anonymous-User-42 ...