Social engineering refers to malicious activities accomplished through human interactions.
Trojan Horse Virus is a type of malware that downloads onto a computer disguised as a legitimate program.
Trojan horses take advantage of the people who need a certain program to operate on their computer system. They use social engineering to bait in endpoint users to download the fake programs.
1970-80s which is when some of the first computers were created like apple computers which looked like a giant cube and a rectangle on the side which is very different than what we have today.