The thinkpad x series is a line of notebook computers and convertible tablets originally produced by ibm and now marketed by lenovo. ibm announced the thinkpad x. Thinkpad x series lightweight laptops are built for the business travelers, productive workers or students looking to do more on the go. browse lenovo india.. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.. Laptops and netbooks :: thinkpad x series laptops :: thinkpad x140e lenovo pc support. lenovo inc. view. shop support. pc data center. X series is the ultraportable laptops, where weight saving is the primary purpose, with the exception of the superseded x301, none of them have the optical drive.