T61p

Standard Features

 * One of the following processors:
 * Intel Core 2 Duo (Merom) 1.8, 2.0, 2.2, 2.4 or 2.6 GHz 800MHz, 2-4MB L2 Cache CPU
 * Intel Core 2 Duo (Penryn) 2.1, 2.4, 2.5, 2.6 GHz 800MHz FSB, 3-6MB L2 Cache CPU
 * One of the following discrete graphics adapters:
 * nVidia Quadro FX 570M (128 MB) (Only in 14.1")
 * nVidia Quadro FX 570M (256 MB) (Only in 15.4")
 * One of the following displays:
 * 14.1" TFT display with 1400x1050 (SXGA+) resolution
 * 14.1" TFT display with 1400x900 (WXGA+) resolution
 * 15.4" TFT display with 1680x1050 (WSXGA+) resolution
 * 15.4" TFT display with 1920x1200 (WUXGA) resolution
 * 1 or 2 GB PC2-5300 memory standard upgradable to 4 GB (8G is not officially supported but works)
 * 60, 80, 100, 120, or 160 GB 5400 rpm 2.5" SATA HDD
 * 60, 100, 120, 160, or 200 GB 7200 rpm 2.5" SATA HDD
 * Full Disk Encryption (FDE) Available on some models
 * Intel HD Audio with AD1984JCP codec
 * Intel Gigabit Ethernet (10/100/1000) PCI-Express
 * UltraBay Slim with one of the following:
 * UltraBay Slim Super Multi-Burner Drive
 * MiniPCI Express slot 1 with one of the following:
 * None (empty)
 * ThinkPad 11a/b/g Wireless LAN Mini Express Adapter
 * ThinkPad 11a/b/g/n Wireless LAN Mini Express Adapter
 * Intel PRO/Wireless 3945ABG Mini-PCI Express Adapter
 * Intel PRO/Wireless 4965AGN Mini-PCI Express Adapter
 * MiniPCI Express slot 2 with one of the following:
 * None (empty, not upgradable)
 * Verizon 1xEV-DO WWAN Adapter
 * 1GB Intel® Turbo Memory hard drive cache
 * MiniPCI Express slot 3 with one of the following:
 * None (empty, not upgradable)
 * Wireless USB (UWB)
 * 1 CardBus slot (Type 2)
 * 1 Slot with one of the following:
 * ExpressCard/54 slot
 * SmartCard reader
 * 4-in-1 Memory reader
 * Trusted Computing Group TPM 1.2
 * Active Protection System
 * Integrated Fingerprint Reader on select models
 * Bluetooth on select models
 * ThinkPad 56K Modem (MDC-1.5)
 * UltraNav (TrackPoint / Touchpad combo)
 * Firewire 400 (IEEE1394a) on select models
 * Intel Active Management Technology (AMT) on select models
 * Centrino Pro on select models

Original OS

 * Windows Vista Business
 * Windows Vista Home Basic
 * Windows Vista Home Premium
 * Windows Vista Ultimate
 * Windows Vista Starter
 * Windows Vista Enterprise
 * Windows XP Professional (some models)
 * Windows XP Home Edition (some models)

Other OS
This is The Last Laptop to have 4:3 Ratio and The Last Laptop to have Windows XP Preinstalled on this Laptop.