The domain in an email message tells you what?

Some of the first computer games were created in the early 1970s by college students experimenting after hours to see what the were capable of doing.

Asequential circuit contains a register of four flip-flops. initially a binary number n (0000 ≤ n ≤ 1100) is stored in the flip-flops. after a single clock pulse is applied to the circuit, the register should contain n + 0011. in other words, the function of the sequential circuit is to add 3 to the contents of a 4-bit register. design and implement this circuit using j-k flip-flops.

How can you tell if someone sent you a text message to your email instead of a email