1949 Event 1st 45 RPM record released 1949 Event RCA releases 1st single record ever (45 rpm) 1949 Event RCA introduces 45 RPM record 1948 Event 33 1/3 RPM LP record introduced (DR Peter Goldmark-Columbia Records) 1948 Event Columbia commits to 33 1/3 rpm records, plans to phase out 78's as Dr. Peter Goldmark of CBS demonstrates "long playing record" 1934 Event RCA Victor re leases 1st 33 1/3 rpm recording (Beethoven's 5th)
