PS (post script) is file format that can be both vector image and document file. It can contain vector images and text at the same time. PS file holds an instruction about how to print. As it supports both text and images so it can instruct printers how to print the file. PS files are later improved as PDF format.
ODP is a document or presentation file that is associated with OpenOffice.org. It is an XML based open source presentation file that supports several text format options. It can also contain images, texts, simple animations etc. All the contents of ODP files are compressed and archived.