1842 Parallelism in computing: Menabrea, L. F. (1842). Sketch of the Analytic Engine Invented by Charles Babbage. Bibliothèque Universelle de Genève. Retrieved on November 7, 2007.
1958-1970 Parallel computers: IBM Burroughs, Corp, Honeywell, Wilson, Gregory V. (1994). The History of the Development of Parallel Computing. Virginia Tech/Norfolk State University, Interactive Learning with a Digital Library in Computer Science.
1992 Message passing interface as a standard for communication across compute nodes in inherently and massively parallel architectures. Walker DW (August 1992). Standards for message-passing in a distributed memory environment. Oak Ridge National Lab. Center for Research on Parallel Computing (CRPC). p. 25. OSTI 10170156. ORNL/TM-12147.
2005 Establishment of multicore architecture by intel and others to circumvent the power wall inhibiting Moore’s law; standardization of OpenMP [10.1145/1562764.1562783]. (see OpenMP.org)
2007 Release of CUDA:  parallel computing platform and application programming interface (API)  for graphics processing units (GPUs)