Operating system : Genuine Windows® 7 Professional 32
Genuine Windows® 7 Professional 64
Windows XP Professional (available through downgrade rights from Genuine Windows® 7 Professional)
Genuine Windows Vista® Business 32
FreeDOS
Processors : Intel® Core™ i7-620M Processor (2.66 GHz, 4 MB L3 cache)
Intel® Core™ i5-540M Processor (2.53 GHz, 3 MB L3 cache)
Intel® Core™ i5-520M Processor (2.40 GHz, 3 MB L3 cache)
Specialized Design : HP 3D DriveGuard; Intel® Core™ i5 with vPro/Intel® Core™ i7 with vPro technology capable
Memory : 2 GB 1333 MHz DDR3 SDRAM
4 GB 1333 MHz DDR3 SDRAM
(All memory bus runs at a maximum of 1066 MHz)
Memory upgrade : Upgradeable to 8 GB
Memory slots : 2 SODIMM
Storage Hard drive : 160 GB 5400 rpm 1.8-inch SATA II
250 GB 5400 rpm 1.8-inch SATA II
80 GB 1.8-inch Solid State Drive
160 GB 1.8-inch Solid State Drive
Graphics Display size : 12.1″
Graphics : Intel® HD Graphics
Microsoft DirectX 10 (Shader 4.0) and OpenGL 2.0 capable
Integrated camera : Optional 2 MP webcam with Business Card Reader Software
Audio, Slots, and Ports
I/O Ports : 3 USB 2.0
1 external VGA monitor
1 1394a
1 combo stereo headphone/mic jack
1 AC power
1 RJ-11
1 RJ-45
1 docking connector
1 secondary battery connector
Slots : 1 Express Card/34
1 Smart Card Reader
1 Secure Digital
Audio : High Definition Audio support w/24-bit DAC; Integrated stereo speakers; Integrated dual-microphone array; Touch-sensitive controls for volume up, volume down, and mute; Combo headphone/mic jack

Communication features
Network interface : Integrated Intel Gigabit Ethernet (10/100/1000 NIC)
Wireless : Optional HP Mobile Broadband (powered by Gobi™) with GPS; Intel Centrino 802.11a/b/g/n; Broadcom 802.11a/b/g/n; Broadcom 802.11b/g; HP Integrated Module with Bluetooth® 2.1 Wireless Technology
Broadband service provider : AT&T, Sprint or Verizon Wireless
Product specifications
Weight : Starting at 3.80 lb (1.72 kg)
Dimensions (w x d x h) : 14.7 x 9.9 x 1.28 in (373.5 x 251.5 x 32.4 mm)
Battery : 6-cell (44 WHr) Li-Ion; HP Long Life 6-cell (39 WHr) Li-Ion
Power supply : External 65-watt Smart AC adapter; HP Fast Charge
Security management : Standard: HP ProtectTools, Integrated Smart Card Reader, HP Fingerprint Sensor, TPM Embedded Security Chip 1.2, Kensington Lock slot, Enhanced Pre-Boot Security, HP Spare Key (requires initial user setup), HP Disk Sanitizer; Enhanced Drive Lock, Drive Encryption for HP ProtectTools, Credential Manager for HP ProtectTools, File Sanitizer for HP ProtectTools
Optional: LoJack for HP ProtectTools, McAfee Security Solution

For HP EliteBook 2740p Tablet PC Drivers for Windows XP, Vista and Windows 7 can be downloaded here.

For HP EliteBook 2740p User’s Manual and Guide can be found here.