Complex sentence: Control-C as an abort command was popularized by TOPS-20 and TOPS-10 and adopted to other systems including Unix, and Digital Equipment operating systems from which it was copied to CP/M and thus to MS-DOS and Microsoft Windows.
Split into simpler sentences: Control-C as an abort command was popularized by TOPS-20 and TOPS-10 and adopted by other systems including Unix. It was also adopted by Digital Equipment operating systems, from which it was copied to CP/M and thus to MS-DOS and Microsoft Windows.