We'd still be using triple-DES to protect data, arguing that the NIST time to break it was still far out beyond. And hash functions would be like the CRC32 in TCP, not the modern stuff.

CISC computers which did more in parallel per instruction would be common because they existed for concrete reasons: the settling time for things in a discrete logic system was high, you needed to try and do as much as possible inside the time. (thats a stretch argument. they were what they were, but I do think the DEC 5 operand instruction model in part reflected "god, what can we do while we're here" attitudes) -We'd probably have a lot more Cray-1 like parallelism where a high frequency clock drove simple logic to do things in parallel over matrices, so I guess thats GPU cards.