> I'm not familiar with Cal State but do they just let anyone in who applies?
No, Cal State is the 2nd of three public college tiers defined by California law. (Top is the UC system, bottom is the community college system, which will indeed let in anyone who applies.)
CSUs, except for Cal Poly SLO, admit on a quota-by-major system, scoring all applicants objectively and taking the top $quota who applied in each major with a score above the minimum admittance threshold. Some majors at particular campuses, and some entire campuses, are considered "impacted", which means they get enough applicants that you're unlikely to be admitted with a score near the minimum threshold. The converse of this is that if you're above the minimum threshold, and you apply to a non-impacted campus, you'll be admitted. If your school gave you As, you'll beat the threshold without any inquiry into the quality of your school, or whether it was possible to receive grades lower than A.
Here's CSU San Jose's policy (they're impacted):
> To be considered for admission, graduates of California high schools or residents of California, as defined for tuition purposes, must have a minimum eligibility index of 2950 using the redesigned SAT or 694 using the ACT. The minimum eligibility index for nonresidents of California is 3570 using the redesigned SAT or 842 using the ACT. The CSU eligibility index is calculated by using either the SAT or ACT as follows:
> SAT (sum of scores in mathematics and critical reading) + (800 x high school grade point average)
> -or-
> (10 x ACT composite score without the writing score) + (200 x high school grade point average)
( http://info.sjsu.edu/web-dbgen/narr/static/admission/freshma... )
Obviously, this scoring system is massively biased in favor of GPA over test scores (if you were running a college, would you rather admit someone with a 4.0 GPA and an 800 total SAT score, or someone with a 3.0 and a 1600?), which does a lot to explain why the caliber of students in CSUs is so low. I found it interesting, when I was looking into this a few years ago, that CSU San Francisco was impacted in their "social work" "major", but not in computer science.