What are PDPs?

PDP in telecom stands for Packet Data Protocol. Wikipedia has a nice entry for it.
http://en.wikipedia.org/wiki/Packet_Data_Protocol#PDP_Context

But what if someone uses PDP with a number; like, "Vodafone has an average of 1 million PDPs"? What they actually mean is 1 million PDP contexts; or in simple words: 1 million devices accessing data.

How to open Iomega LPHD-UP3

I learnt it the hard way, damaging the casing. You don't have to repeat my mistakes.

• Open the outside 2 screws with a Philips screwdriver
• The black outside plastic cover should come off easily
• Next a silver metal plate should come off easily as well
• Holding the outside metal body in one hand, push the black inner plastic away (along the length of the hard drive enclosure
• The inner plastic holding should slide out of the other end of the enclosure, and you're done!