Acer Aspire Timeline AS5810TZ-4274 comes with these spec: Operating System Windows Vista Home Premium Memory Size 3GB DDR3 Hard Disk 320GB Graphics Card Intel GMA 4500MHD Video Memory Shared memory Dimensions 14.9" x 10.2" x 0.97" - 1.16" Weight 5.3 lbs. Video Port 1 x VGA Card

Acer Aspire Timeline AS3810T comes with these spec: Operating System Genuine Windows Vista(R) Home Premium Genuine Windows Vista(R) Home Basic Processor & Chipset Intel(R) Centrino(R) 2 mobile processor technology, featuring Intel(R) Core™2 Duo processor with 3 MB L2 cache, supporting Intel(R) 64 architecture or Intel(R) Centrino(R) mobile

Acer Aspire Timeline AS3810TZ-4806 comes with these spec: Operating System Genuine Windows(R) 7 Home Premium Processor Intel(R) Core™2 Duo Processor SU9400 (3MB L2 cache, 1.40GHz, 800MHz FSB) or Intel(R) Core™2 Duo Processor SU7300 (3MB L2 cache, 1.30 GHz, 800MHz FSB) or Intel(R) Pentium(R) Processor SU4100 (2MB L2

Acer Aspire Timeline AS5810TZ-4433 comes with these spec: Operating System Genuine Windows(R) 7 Home Premium Processor & Chipset Intel(R) Centrino(R) 2 processor technology, featuring: Intel(R) Core™2 Duo processor SU9400 or SU7300 (3 MB L2 cache, 1.40/1.30 GHz, 800 MHz FSB, 10 W), supporting Intel(R) 64 architecture orIntel(R)

Acer Aspire Timeline AS3810T comes with these spec: Operating System Genuine Windows Vista(R) Home Premium Genuine Windows Vista(R) Home Basic Processor & Chipset Intel(R) Centrino(R) 2 mobile processor technology, featuring Intel(R) Core™2 Duo processor with 3 MB L2 cache, supporting Intel(R) 64 architecture Intel(R) Centrino(R) mobile processor