«123 file extension» (en anglès). [Consulta: 10 febrer 2010]. «Lotus 1-2-3 was IBM PC's first killer application; its huge popularity in mid-1980s contributed significantly to the success of IBM PC in the corporate environment.»
drdos.com
«DR-DOS 7.03» (en anglès). DRDOS. Arxivat de l'original el 2008-12-21. [Consulta: 2 març 2010].
«CP/M alive, well, and growing in the VAD channel» (en anglès). InfoWorld, 17-06-1985. [Consulta: 9 febrer 2010]. «Despite value-added dealers' efforts, Morrow executives don't believe that CP/M machines will stick around very long. "It is going to trend down, and there is nothing that can be done to stop it", says Berghorn. "Probably the memory limitation is the deficiency".(…)"That is probably the biggest killer… You can't [use] Lotus 1-2-3 with CP/M. That probably dictade it demise."»[Enllaç no actiu]
Nancy Groth. «Kaypro is Retreating On CP/M» (en anglès). InfoWorld, 10-02-1986. [Consulta: 9 febrer 2010]. «The popularity of CP/M-based machines dwindled as less viable software applications were written and faster machines were released, according to analysts. "The market for CP/M machines is dead", said Evan Moltz, director of micro services at International Data Corp. (IDC), in Framingham, Massachusetts.»[Enllaç no actiu]
«CP/M and Digital Research Inc. (DRI) History» (en anglès). [Consulta: 16 gener 2009]. «CP/M became the «software bus» for the new Intel-based microcomputers of the 1970's and well into the 1980's.»
«Understanding disk images for the CP/M emulation» (en anglès). Arxivat de l'original el 2010-09-29. [Consulta: 12 febrer 2010]. «Under CP/M 3 and MP/M 2 you can execute the programs from other user areas with i:program, because this OS's honor the SYS attribute for files in user area 0 appropriate. CP/M 2 doesn't support this, which makes it uncomfortable to use user areas under this OS.»
«Understanding disk images for the CP/M emulation» (en anglès). Arxivat de l'original el 2010-09-29. [Consulta: 12 febrer 2010]. «Under CP/M 3 and MP/M 2 you can execute the programs from other user areas with i:program, because this OS's honor the SYS attribute for files in user area 0 appropriate. CP/M 2 doesn't support this, which makes it uncomfortable to use user areas under this OS.»
