explain SPV,SEZ,PPT,SPD

Dear Student, it is extremely difficult for us to state the explanations of these terms without knowing the proper context. Thus, it is adviseable that you try to provide us with the context in which you have come across these terms. These terms are not among those which have a wider or general applicability, hence, we are asking you to provide us the context. Nevertheless, we are providing you the full-forms of two terms. Just look for their existence in the relevance of the concerned context. Do get back to us.
1. SPV-Special Purpose Vehicle
2. SEZ-Special Economic Zones