SAP follows any std Nomenclature while defining a T-code....?

Dear Friends :

Usually industries follow some std while define their Materials, Drawings etc., called "NOMENCLATURE"

for e.g., see the,

Material Number : LT123456

where,

First 2 Digits says their CUSTOMER

Second 4 Digits says model of the PRODUCT

Last 2 Digits says PRODUCT LINE to which the material belongs.

MY QUESTION IS :

Is the T-codes are defined with the same principles as above.....?

Thanks With Regards,

Dinesh Kumar V.