TCO methodologies - Client/Server, Thin Client Enviroment

[Siwus]

Hi everyone,

I'm looking for any sources of TCO (Total Cost of Ownership)
methodology description.
- description, exaples, everything can help

I'm trying to compare those methodologies each other, but
unfortunately I'm "blind" or there is nothing to compare ;/

I will be very grateful for any kind of help, concerning thin client
cost calculating

Reagrds
Martin