The Pascal Language Handbook by Michael L. Hall and Robert D. Reimiller.
The original Pascal programming language was developed in the early 1970s by Niklaus Wirth and implemented on a CSC 6000 computer in Zurich, Switzerland. The version of Pascal discussed here was implemented by OMEGASOFT, Sunnyvale, California, and apparently targeted an 8-bit 6809 micro-computer.
Some "extensions" of the original Pascal include a STRING data type. Since the target machine is small, the PACK and UNPACK statements of original Pascal are not supported; some I/O details also may vary from commonly used versions of Pascal.
This second printing of the manual is dated January, 1982.