The CA application is online.
Email distribution list: The CS Department accepts CA applications on a quarterly basis. Danielle Hoversten sends an email annoucement to the CS-MS and CS-PhD mailing lists each quarter when applications go live. If you're a non-CS student who would like to receive only these announcements, please sign up for the CA announce mailing list here.
Autumn Quarter: applications accepted from late June through late July. Offers made in early September.
Winter Quarter: applications accepted from mid-October through late October. Offers made in early December.
Spring and Summer Quarters: applications accepted from early February through mid-February. Offers made in early March.