Phister's <https://books.google.com/books/about/Data_processing_technology_and_economi cs.html?id=MwMpAQAAMAAJ> numbers in Table II 1.27a Supplies Line Item Figure Units 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 20 Total Tapes Shipped M 0.085 0.227 0.544 0.825 1.37 2.25 2.97 3.2 4 5 5.7 4.7 4.5 6.6 9.4 9.9 9.7 10.1 10.7 11.2 tom -----Original Message----- From: Shoppa, Tim [mailto:tshoppa at wmata.com] Sent: Monday, August 06, 2018 11:34 AM To: 'cctalk at classiccmp.org' Subject: Re: Computer tape quantities in the 70's or 80's? Chuck writes: 1987-88 Wow, Chuck, that is fascinating info that I had no idea was so easily accessed. Thank you! It looks like the tape production in the 80's was 30M to 40M reels per year so my guess at 100M was high but not too far off. I super like some of the product codes just on those pages. E.g. 35711 22 is Analog Computers, and 35751 75 is Teleprinters under 20 characters per second (e.g. Model 33's which saw a steep decline through the 1980's. I'm guessing they would've peaked in the early 70's.). Tim N3QE