Though ThinkPads have adopted new technologies and features over the years, they have had more constants - a conservative, blocky design a keyboard made for lots of typing that nubbin just above the B key - than changes, and you can draw a direct line from the first ThinkPad laptop to the ones that you can purchase today. For over 25 years, IBM and then Lenovo have been cranking out the utilitarian workhorses that put business needs first. There are few things more consistent in the tech world than ThinkPad laptops.