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References
- ↑ Freshwater, R. "IBM 8750". THE TELEPHONE FILE. Retrieved April 29, 2018.
- ↑ Brown, Bob (Dec 19, 1988). "IBM, Siemans carve up ROLM operations". Vol. 5, no. 51. Network World. Retrieved April 29, 2018.
- ↑ IBM brochure G511-1025-0 dated 10/87; System description GA19-5480 and 20 other manuals
- ↑ "History of ROLM, IBM, and Siemens Enterprise Communications".
- ↑ Markoff, John (14 December 1988). "IBM to sell Rolm to Siemens". The New York Times. No. Dec 14, 1088. The New York Times. Retrieved April 29, 2018.