The T series of laptops are part of Lenovo's ThinkPad product line. The ThinkPad T series is officially the flagship ThinkPad product, offering high-performance computers aimed at businesses and professionals, originally introduced in 2000. Formerly an IBM brand, the series was produced by IBM until Lenovo acquired the ThinkPad brand following its purchase of IBM's Personal Computing Division (PCD) in 2005.

History of IBM-branded models

IBM introduced the T series as part of their ThinkPad brand in May 2000, succeeding the high-end ThinkPad 600 and 700 series. The laptop was meant to cater to users working with multiple networks and in different environments. This resulted in the development of the IBM Embedded Security Subsystem.

From its inception, the series was designed to balance speed and mobility. Despite a 14.1-inch screen, similar to desktops at the time, the titanium composite body on the laptop was designed to keep the weight as low as possible. Users were also given options to swap components for mobility, like a DVD player, writeable CD drive or numeric keypads.

The ThinkPad T20 was released by IBM as the successor to the ThinkPad 600X and ThinkPad 770Z series laptops. With a weight of , the T20 was the lightest laptop offering with a screen size of . With the addition of an internal 8x DVD-ROM drive, the weight remained as low as .

In October 2000, the ThinkPad T20 was upgraded and released as the ThinkPad T21 laptop with the Intel Mobile Pentium III (800 MHz) CPU. The 14.1-inch liquid-crystal display (LCD) offered a higher resolution of . The hard disk space offered was a 32 GBhigh for the time.

Further minor refinements were made to the T2X series resulting in the T22 and finally in 2002 with the T23 a Pentium III-M 1.13 GHz "Tualatin" having 128 MiB of RAM and a 30 GB hard drive.

The ThinkPad T30 was released in May 2002, with options for the Intel Mobile Pentium 4-M processor with the Intel 845 MP Mobile Chipset. Additional options included the ATI Mobility Radeon 7500 video controller with 16 MiB graphics memory, a 14.1-inch LCD with a resolution of , and 1 GiB PC2100 RAM. This was complemented by a 60 GB hard drive and a DVD-ROM/CD-RW combo drive, making it a powerful laptop.

Announced in March 2003, the ThinkPad T40p represented the first in the T series' "performance" class of laptops. The ThinkPad T40p offered a Pentium M clocked at 1.3, 1.5, or 1.6 GHz, ATI Mobility Radeon 9000 with 64 MiB VRAM, a 14.1-inch LCD with resolution, a maximum of 2 GiB PC2100 RAM, and a 60 GB IDE hard disk. The design was followed by the T41 and T41p and the T42 and T42p (ATI Mobility Radeon 7500, 9600, and Mobility FireGL T2), with almost complete parts interchangeability, except for the fan (normal or p-series), keyboard (14.1" or 15"), screen (14.1" or 15"), and screen inverter. The 15-inch T42 and T42p models were offered with an optional or "FlexView" IPS LCD.Launched in April 2004, the ThinkPad T43 and T43p laptops were the last T-series laptops manufactured by IBM. The major improvement was a move to lower-cost DDR2 RAM and a bus speed increase from 400 MT/s to 533 MT/s. Their Pentium M Dothan features the XD bit, making it the first ThinkPad that could run Windows 8.

In December 2004, Lenovo announced the acquisition of the IBM PC division including the ThinkPad brand. At the time, 40% of the PC division was working in China, and ThinkPads were being made by Lenovo's arch-rival Great Wall Technology.

+IBM ThinkPad T series (2000–2004)CasetypeScreenTypeT2*T3*T4*T6*4:3 screens14.1"13.3"MainstreamT20T21T22T23merged with 14" line14.1"MainstreamT20T21T22T23T30T40T41T42T43T60T61/T61uPerformanceT40pT41pT42pT43pT60pT61p15"MainstreamT42T43T604:3optionsremovedPerformanceT42pT43pT60p16:10 screens14.1"MainstreamT60T61PerformanceT60pT61p15.4"MainstreamT60T61PerformanceT60pT61p

History of Lenovo-branded models Lenovo released the ThinkPad T60 and T60p laptops in February 2006. While designed and manufactured by Lenovo, the T60 and the T60p still featured the IBM logo on the machines. In May 2007, the T61 and T61p laptops slowly phased out IBM logos in favor of the ThinkPad logo. It also was the first T series model to adopt widescreen resolution as a mainstream option; the traditional 4:3 aspect ratio screens was also offered as an alternative at the time but mass industry adoption of the widescreen standard meant that it was the last ThinkPad of its kind to use the 4:3 standard.

The naming convention for the T series was changed by Lenovo following the release of the ThinkPad T400, T400s, and T500 in July 2008. The Txxp models (like the T61p) were replaced by the W series. Designed as mobile workstations, the W series grew to become Lenovo's line of performance-oriented laptops. The T series remains Lenovo's premier line of laptops, aimed at corporate and enterprise users and is praised by users for its outstanding Linux compatibility. The T-p lineup later returned as an irregular T##0p line with only T440p, T460p, T470p and T540p models. They were replaced by the P series.

+Lenovo ThinkPad T series (2005–2025)ScreenTypeT*0*(2008)T*1*(2010)T*2*(2011)T*3*(2012)T*4*(2013)T*5*(2015)T*6*(2016)T*7*(2017)T*8*(2018)T*9*(2019)202020212022202320242025IntelIntelIntelIntelIntelIntelIntelIntel AMDIntel AMDIntel AMDIntel AMD QualcommIntel AMD Qualcomm14.1"UltrabookT430ureplaced by T431s and X1 CarbonLow-cost slimT400siT410siT420siT430siLow-costT400iT410iT420iT430iSlimT400sT410sT420sT430sT431sT440sT450sT460sT470sT480sT490sT495sT14sGen1T14sGen2T14sGen3T14sGen4T14sGen5T14sGen6T14sGen6TBDTBDMainstreamT400T410T420T430T440T450T460T470A475T480A485T490T495T14Gen1T14Gen2T14Gen3T14Gen4T14Gen5T14Gen6T14Gen6PerformanceT440pT460pT470p15.6"Low-costT500iT510iT520iT530iMainstreamT500T510T520T530replacedby T540pT550T560T570T580T590T15Gen1T15Gen2replaced by T16PerformanceT540preplaced by W541 and T550T15pGen1T15pGen2T15pGen3replaced by P16vAdvanced graphicsT15gGen1T15gGen2replaced by P1616"MainstreamT16Gen1T16Gen2T16Gen3T16Gen4Suffixes to denote: u - Ultrabook i - Low-cost s - Slim p - Performance g - Advanced graphicsModels prior to 2020 uses this convention:The first number after the letter T is the screen size in inch without the number 1 (i.e. T5xx for 15" models).The second number is the generation.Intel-based models have the last number being0 or 1 while AMD-based models have the number being 5 or 6.Models whose last number is 1 or 6 are refreshes of their variants with the last number being 0 or 5.Docking stations compatibilityEssential Port Replicator;Advanced Dock;Advanced Mini DockAllUSB Port Replicator with Digital VideoAllPort Replicator Series 3;Mini Dock Series 3;Mini Dock Plus Series 3 (90/135/170W)AllCS09 04X0856 adapterrequired for T431sUSB 3.0 Basic Dock;USB 3.0 Pro Dock;USB 3.0 Ultra DockAllBasic Dock;Pro Dock;Ultra Dock (90/135/170W)All except some models withdiscrete graphicsUSB-C DockAllBasic Dock (USB-C)All

The ThinkPad 25th anniversary edition was released on October 5, 2017. It was based on the T470, but brought back the classic 7-row keyboard. In 2018, Lenovo introduced the ThinkPad A485, which officially is not part of the T series, but it shares the same housing as the T480. It offers an AMD Ryzen PRO 2000 processor and lacks Thunderbolt 3 support but has USB-C support. The A475 had been similarly released in 2017 as a variation of the T470, but with AMD Carrizo or Bristol Ridge processors. In 2019 Lenovo officially introduced AMD CPUs in the T series, and differentiated it with the digit 5 at the end of the model number (i.e. T495).

From 2020 onwards, the naming scheme was changed again, with the letter "T" followed by the screen size in inches, then the generation number and the screen size and CPU manufacturer in brackets (e.g. T14s Gen 2 (14" Intel), T16 Gen 1 (16" AMD)), similar to the scheme used by the X1 series.

Lenovo-branded models

2008-2009

T400

T400s The ThinkPad T400s is a slimmed-down T400 with a soldered 25 W processor, support for smaller batteries, and no discrete graphics option.

T500

Model Release (US) Dimensions (mm / in) Weight (min) CPU Chipset Memory (max) Graphics Storage Networking Audio ScreenBattery OtherOperating System 14"T400 July 2008 Up to Intel Core 2 Duo T9600 (2C2T 2.8GHz 6 MB L2) Mobile Intel GM45 Express8 GB DDR3 1066 MHz (2 slots)Intel GMA 4500MHD Intel 82567LM Gigabit Ethernet Intel WiFi Link 5100 Mini PCIe Card High Definition (HD) Audio & Conexant CX20561 with stereo speakers and digital microphone M(9)U One white ThinkLight Windows XP Professional preinstalled through downgrade rights in Genuine Windows 7 Professional 32-bitT400s June 2009 Intel GS45Intel GMA 4500MHD Intel 82567LM Gigabit Ethernet Intel WiFi Link 5100 Mini PCIe Card M(6)UOne white ThinkLight 15"T500July 2008 Up to Intel Core 2 Duo T9800(2C2T 2.93GHz 6 MB L2)Intel GM458 GB DDR3 1066 MHz (2 slots)Intel GMA 4500MHD Gigabit EthernetWi-Fi Mini PCIe Card M(9) UOne white ThinkLight

2010

T410

With this model, Lenovo started to change the standard block on the top right of the keyboard. The Insert key moved above the key and the height of a key was doubled.

In April 1st, 2014, Lenovo issued a product recall, on specific ranges of ThinkPad series batteries which had shipped from October 2010 to April 2011 due to a potential fire hazard, including some shipping with/for that model.

T410s While the T410 and T510 use the Serial UltraBay Enhanced, the T410s continues to use the Serial UltraBay Slim to achieve a thin and light design.

T510

Model Release (US) Dimensions (mm / in) Weight (min) CPU Chipset Memory (max) Graphics Storage Networking Audio ScreenBattery OtherOperating System 14"T410 Jan 2010 1st Gen Intel CoreUp to i7-620M (2C4T 2.66/3.33GHz Turbo) Intel QM578 GB DDR3 1066 MHz (2 slots)Intel GMA HD Intel 82577LC Gigabit Ethernet Intel Centrino Wireless-N 1000 Half Mini PCIe Card High Defi nition (HD) Audio & Conexant 20585 with stereo speakers, speaker volume up, down and mute buttons, dual array microphone, mic mute button and combo audio/mic jack M(9) SOne white ThinkLightWindows 7T410s 1st Gen Intel CoreUp to i5-560M(2C4T 2.66/3.2GHz Turbo) Intel QS57Intel GMA HD Intel 82577LC Gigabit EthernetThinkPad 11 WiFi Half Mini PCIe Card M(6) U 15"T510 Jan 2010 1st Gen Intel Core Up to i7-640M(2C4T 2.8GHz 4 MB L3) Intel QM57 Intel HD Graphics Gigabit EthernetWi-Fi Half Mini PCIe Card M(9) SOne white ThinkLightNvidia graphics cards switch with Optimus Technology.

2011

T420

T420s

T520

Model Release (US) Dimensions (mm / in) Weight (min) CPU Chipset Memory (max) Graphics Storage Networking Audio ScreenBattery OtherOperating System 14"T420 Feb 2011 2nd Gen Intel CoreUp to i7-2670QM(4C8T 2.2/3.3GHz Turbo)Intel QM67 Intel HD 3000 Intel 82579LM Gigabit Ethernet Intel Centrino Wireless-N 1000 Half Mini PCIe Card BT 3.0 ModuleHigh Defi nition (HD) Audio & Conexant 20672 with stereo speakers, volume up, down, mute buttons, dual array mic, mic mute button and combo audio/mic jack M(9)SOne white ThinkLightWindows 7 ProfessionalT420s 2nd Gen Intel CoreUp to i7-2640M (2C4T 2.8/3.5GHz Turbo) Intel 82579LM Gigabit Ethernet ThinkPad 11 Wireless Half Mini PCIe Card BT 3.0 Module M(6)U 15"T520 Feb 2011 2nd Gen Intel CoreUp to i7-2860QM (4C8T 2.5GHz 8 MB L3) Intel QM67 Intel HD 3000 Gigabit EthernetWi-Fi Half Mini PCIe Card M(9) SOne white ThinkLightWindows 7 ProfessionalNvidia graphics cards switch with Optimus Technology.

2012 Original standard five/six-key block ( , the key moved away in 2010 models) disappeared.

T430

T430s

T430u

T530