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An ADP Newsletter cited on page 56 in
Weiss, Eric A., ed. (1969). Computer Usage Essentials. McGraw-Hill. LCCN71-76142. shows sales of the 360/ "20 .. 33.6%, 30 .. 36%, 40 .. 22.6%" = 92.2%
Melinda Varian, VM and the VM community, past present, and future, SHARE 89 Sessions 9059-9061, 1977; available online at www.princeton.edu/~melinda – CP/CMS and VM history
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