Where can I get complete & formal documentation about old products of Primavera (e.g. P3e)?

Hello Oracle Communities,

I need some explanation about these old products since some of my client still use them and ask for version upgrade but I can't find any formal information/documentation about them on the internet. The products are:

1. Primavera P3e Project Planner Professional – Concurrent User Perpetual

2. Primavera P6 Level 3 – Named User Perpetual

3. Primavera P3e Developer – Named User Perpetual

4. Primavera P6 Level 4 – Concurrent User Perpetual

I need the answers as soon as possible, so I really appreciate if you guys can suggest me any formal documentation or simply describe them on the comment section.

Thank you.