Meaning of Legacy Thinkpad letters.

[Thinkpad4by3]

So far the only 7 I can figure out are C,S,D,P,T,V,BJ

BJ-BubbleJet
C-Color Display
D-CD Drive
E-??
L-??
P-Pen Input
S-STN Display
T-Tablet
V-755 Machines with the removable backs.
X-??
Z-??

What do the other 4 mean? The only other thing is what was IBM thinking when they skipped numbers and just came back with others later(701c,310)

[fultontech]

E=Enhanced. To oversimplify, the CPU was changed to a full 486 rather than the rebranded/expanded 386 IBM had

[Saucey]

X was a latter CPU & possible motherboard upgrade and Z was an upgrade after that.

Looking at ThinkWiki, I believe the 'L' stood for lower end. Some of the ThinkPads with L in it had a lower cost screen.

You forgot P for pen enabled ThinkPads.

[axur-delmeria]

The "L" suffix seems to exist only on the 760 series. It seems to be connected to presence of the ES1688 sound card and the lowest-resolution screen.

E --> 1st CPU upgrade?
X --> 2nd CPU upgrade?
Z --> 3rd CPU upgrade?

[kfzhu1229]

As for E, D, X, Z in 770 series, it is much more clear.
None: initial model
D: Pentium MMX 233
E: Pentium II 266
ED: first DVD model with MPEG2 decoder
X: first with SXGA option or 14.1 XGA, better GPU with MPEG2 decoder integrated instead of as a separate card, PII 300, higher amount of soldered RAM
Z: Final revision: PII 366, larger HDD

[danikayser84]

As for E, D, X, Z in 770 series, it is much more clear.
None: initial model
D: Pentium MMX 233
E: Pentium II 266
ED: first DVD model with MPEG2 decoder
X: first with SXGA option or 14.1 XGA, better GPU with MPEG2 decoder integrated instead of as a separate card, PII 300, higher amount of soldered RAM
Z: Final revision: PII 366, larger HDD

I think there is no 770D (I've never seen one, but ThinkWiki makes a reference to one), only 770 (even then, 770D would have been a DVD drive model, not a faster CPU)

[kfzhu1229]

I think there is no 770D (I've never seen one, but ThinkWiki makes a reference to one), only 770 (even then, 770D would have been a DVD drive model, not a faster CPU)

Me neither. And true say. I don't even think it existed because 770ED was the first one to have DVD drive and first 770 series to have a hardware decoder (MPEG2)