Probably depends on the size of your org and probably what 900x spec your doing. In a previous job, our company of about 150 went through ISO 9001. I was a one man IT dept.
The big thing to remember is if an IT procedure is outlined in your quality docs, then it needs to be followed.
We took a minimalist approach and covered procedures for tape backup, general network security outline, and specific security for the online Quality Manuals.