Editing Occam (programming language) (section)

===occam 2.1===
''occam 2.1''<ref name="oc21refman"/> was the last of the series of occam language developments contributed by Inmos. Defined in 1994, it was influenced by an earlier proposal for an '''occam 3''' language (also referred to as "occam91" during its early development) created by Geoff Barrett at Inmos in the early 1990s. A revised Reference Manual describing occam 3 was distributed for community comment,<ref name="occam3">{{cite journal |last1=Barrett |first1=Geoff |last2=Ericsson-Zenith |first2=Steven |title=occam 3 Reference Manual |url=http://www.wotug.org/occam/documentation/oc3refman.pdf |date=1992-03-31 |publisher=[[Inmos]] |access-date=2008-03-24}}</ref> but the language was never fully implemented in a compiler.

occam 2.1 introduced several new features to occam 2, including:
*Named data types (DATA TYPE x IS y)
*Named records
*Packed records
*Relaxation of some of the type conversion rules
*New operators (e.g. BYTESIN)
*Channel retyping and channel arrays
*Ability to return fixed-length array from function.

For a full list of the changes see Appendix P of the [http://www.wotug.org/occam/documentation/oc21refman.pdf Inmos occam 2.1 Reference Manual].