An easy way to achieve this:
Using Application Designer Search for a project “PPLTOOLS” (PeopleTools 8.52: PeopleSoft Application Designer Developer’s Guide> Planning Records, Control Tables, and TableSets – Table-Based Systems ). It should contain the complete list of PeopleTools Objects.
There also other projects that has only PeopleTools objects, these are used for Upgrade processes. For example on a new installation you usually import the PPLTLS84CUR and PPLTLS84CURML (Installation Manual for PT 8.52 – Task 7A-16-3: Updating PeopleTools Database Objects) to update the application to the current Tools version used, also when a PeopleTools Patch is installed you import a PATCHXXX or PATCHXXXML projects.
Andrés Caro