Funny, just the other day at work I was trying to explain to someone what an FPGA was and I used the 7400 TLL example and said imagine if you had a crate full o

Funny, just the other day at work I was trying to explain to someone what an FPGA was and I used the 7400 TLL example and said imagine if you had a crate full of TTL chips and you could put them all onto a single die, arrange them with the most common ones in little module called LUT's and then be able to cross connect any input to any output using a memory type array. The guy I was explaining it to was familiar with TTL from school and immediately the light went on.