What does the term "calculation engine" mean?
Excel as a typical calculation engine
finaquant .NET libraries as calculation engines with table functions and parameters
Related article at finaquant.com:
finaquant® protos, noncommercial free calculation engine (.NET library):
Presented by: Tunç Ali Kütükçüoglu
Music: Block flute (alto recorder) and piano played by Tunç Ali Kütükçüoglu