ThinkPad X200
Used by 5 peopleshop.lenovo.com ↗

“I also travel with one of two ThinkPad X200's, which is my favorite laptop model - it still holds up after over 10 years.”
Drew DeVault Interview, Software developer · via Uses This 
“I use a ThinkPad X200s, which is about as light a machine (1.1 kg) as you can get and still have a comfortable full-size keyboard.”
Phil Hagelberg Interview, Hacker-errant (Heroku) · via Uses This