11. Gosper later worked with Symbolics and Macsyma, Inc . on commercial versions of Macsyma . 12. Macsyma was one of the largest, if not the largest, Lisp programs of the time.13. Macsyma later became a successful commercial product and is also the core of the free Maxima system.14. Carl Engelman left MITRE for Symbolics where he contributed his expert knowledge in the development of Macsyma . 15. At MIT Macsyma had a link to the PC version ) was about six times slower than Fortran. 16. Macsyma did not have many of the basic algorithms of numerical linear algebra, such as LU decomposition.17. In 1999, Macsyma were acquired by Tenedos LLC, a holding company that previously had purchased Symbolics. 18. Symbolic integration has been one of the motivations for the development of the first such systems, like Macsyma . 19. "' Maxima "'is a computer algebra system based on a 1982 version of Macsyma . 20. The first implementation was done by Joel Moses in Macsyma soon after the publication of Risch's paper.