Hopefully I can help you a little guys:
"Athlon" is a generic name for the current AMD desktop CPU. In the industry CPUs rarely called by this name, rather they use a code name for the core design they use.
For example with the AMD stuff the "thunderbird" is the socketed .18 micron Athlons with the L2 cache "on-die." This is opposed to the older slot processors with the L2 cache ram on seperate chips.
Other examples are (please excuse my terrible spelling
):
Intel-
Kallamath (major sp error) - early P2 (233-333)
Descutes - 350 - 450 P2 core
Medocino - Celeron core (266 - 500 Meg)
Kataimi (sp) - early slot P3s (450 - 600 Meg)
Coppermine - P3 design (600meg - 1gig)
Tualiatin (sp) - new .13 micron P3s (1.13 - 1.26 GigHz)
Willamette - Current P4 core
Northwood - future 478 pin, .13 micron P4 core
McKinnley - Itanium future core design
AMD:
Thunderbird - current socket Athlons
Palomino - Athlon MP, Athlon 4, Athlon XP (due out in 2 weeks at 1.533 GHz, likely called Athlon XP and rated at something like "model 1800".)
Spitfire - Durons up to 933 Mhz
Morgan - Palomino derived Duron ( 1 GHz and up )
Barton, Mustang, Sledgehammer are all future AMD processor design code names.