TY  - GEN
ED  - Perihelion Software Ltd.
TI  - The Helios operating system
SN  - 0133860043 :
U1  - 005.44,PER 
PY  - 1989///
CY  - New York
PB  - Prentice Hall
N1  - PART-1: The User Interface (Page-1), PART-2: The Programmer Interface (Page-145), PART-3: Technical Information (Page-409)
ER  -