Gestalt obj on PC and other possibles to get inqire about system

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Hello 2 all members!
Im working on PC and need to get Inquire about current system,
"gestalt" object generate on PC, help file says:
"On Windows, this function is emulated, and may consequently report slightly different, though meaningful, information."
On fact it tells me alike numbers on all computers in home((
Why its happend and how I may get unique number about current system or computer!

thank you big beforehand

Sergey Komarov, St.Petersburg