Environment Focus
• Function-Centered
– how, not what or why
* Interlisp, Unix, Mentor
• Object-Centered / Relation-Centered
– what, not why or coordination
* STP, Rational
• Process-Centered
– flexible, extensible, programmable
– roles of personnel delineated
* Arcadia, Marvel
(Domain-Oriented) Knowledge-Based
- why, problem-domain programming
* gIBIS, DODE, KIDS