Replicated Man holotapes

The  are a series of holotapes in Fallout 3, all simply called Holotape in the game. They are directly related to the quest "The Replicated Man" and can be found all over the Capital Wasteland.

Locations
Although the locations for the "clue" tapes are fixed, you will not always find the same tape in the same location. Instead a tiered system is used to determine which actual holotape you receive; once you have uncovered a clue of a certain tier, you will advance to the next tier when finding another. For example, if you have already found a tier 1 clue, you will find no other tier 1 clues anymore - instead you will find the tier 2 one at any of the locations you haven't visited. In addition, there are different versions of the tier 1 and tier 3 clues, depending on the type of person you received them from.

The remaining two tapes are received in more conventional manners. Doctor Zimmer gives you Self-determination is not a malfunction at the beginning of the quest and Horace Pinkerton supplies Pre-Harkness Audio Recording at the end of it.

Clue providers
You can receive clues/tapes from the people listed below. The word in the top table row is the "type" which determines what tier 1 and tier 3 clue you get from that person; the tier 2 and tier 4 clue can be received from any of these people. Generally, you always have two options to obtain each clue: either through dialogue or through a terminal/tape in the NPC's possession. The notable exception is Doctor Preston; his tape can only be received through dialogue.

Wanted: Trustworthy Surgeon
Type: medical

Assignment from the Commonwealth
Type: slaver

Rogue Android
Type: sympathizer

Androids are real. No really!
Type: technical

We got the tech, now we need the doc.
Type: medical

Get it done!
Type: slaver

Extreme measures
Type: sympathizer

Oh man! A Circuit Neuralizer!
Type: technical

A free man... a new man...
FML