i am stuck in alpha lab sector 1

Hello i can not find how i can finish alpha lab sector one..i can not find the pda file to enter a door..who can help me?

Try to be more precise, if you want precise answers. There are a bunch of PDAs and locked doors there.

For a start, look at this walkthrough:

http://faqs.ign.com/articles/553/553819p1.html