Maybe they thought agc was a more peaceful, serine, choice?

You mean serene not the amino acid serine.

For the non molecular biologists out there, the 3-base codon AGC gets converted to the amino acid Serine.

https://en.m.wikipedia.org/wiki/DNA_and_RNA_codon_tables

You two, so good. I cannot tell which comment is more amusing. :)

AWS prefers at most three worded service names. Three letter acronyms are easier to remember and pronounce than four.

Is there data behind that claim? The Bloomberg Terminal uses up to four and they are not strictly acronyms — sure, WEI is “World Economic Indices”, but TOP is “Top News” and OMON is “Options Monitor”. Four opens up a much wider range of possibilities in English if you don’t strictly use acronyms because there’s a wealth of short words and abbreviations that are super memorable.

a few examples that come to mind: EC2, EMR, ECR, EKS, RDS, EBS, DMS, ECS, VPC, SSS (S3), SNS, SES, IAM,

How does this list show these are easier to remember than ones with four characters?

The claim was that amazon prefers 3 letters, so the list supports that claim.

And of course, AWS.

although in that case agtc is the obvious choice

Amazon Quantum Ledger Database

(QLDB)