co-founder John Sall's paper on PROC MATRIX, the forerunner of SAS/IML. This paper was presented at the first SUGI, in 1976 - known SAS One.
I was also pleased to see some opinion pieces too. I saw two papers by Grant Blank on the subject of the obsolescence of SAS (SUGI 10 in 1985 and SUGI 16 in 1991), and another by Barbara Ison & Dania Ferguson comparing the newly-introduced macro facility with the existing ability to use LINK statements within DATA steps (SUGI 17 in 1992). I don't necessarily agree with too much of their arguments, but I firmly respect their freedom to offer their opinions. Discussion and opinion seems to have been lost in modern SAS conferences. The focus of papers is now on case studies and product features. Both important and valuable in their own right, but I miss the variety that used to exist.
Programming for Job Security Revisited: Even More Tips and Techniques to Maximise Your Indispensability. Comedy gold, but also a series of high quality tips for making sure your programs are successfully peer-reviewed.