PeopleSoft Portal is a software product line developed by PeopleSoft and later continued by Oracle/PeopleSoft.
PeopleSoft Portal technology is embedded in PeopleSoft application like Campus Solutions, Financials, or HRMS in tools 8.44 or greater. The psc and psp servlets work in these applications very much like in the Enterprise Portal. The advantage of the Enterprise Portal is the Pagelet Wizard, Branding, and other portal specific functionality.
PeopleTools Release 8.5 will include the PS Portal as a delivered core component (no longer a separately licensed product).