Travelmate 8571 Ultra-thin comes with these spec:
Processor
Intel Core 2 Duo Processor SU9400 (3MB L2 cache, 1.40GHz, 800MHz FSB)

Travelmate 5730 250GB comes with these spec:
Dimensions (WxDxH)
14.2 in x 10.5 in x 1.2 in
Weight
6.4 lbs

Acer Aspire Timeline 1810TZ Special Edition comes with these spec:
Operating System
Genuine Windows(R) 7 Home Premium
Genuine Windows(R) 7 Home Basic

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 technology, featuring Intel(R) Core™2 Solo processor with 3 MB L2 cache, supporting Intel(R) 64 architecture
Mobile Intel(R) GS45 Express Chipset
Intel(R) Wireless WiFi Link 5100 (dual-band quad-mode 802.11a/b/g/Draft-N) Wi-Fi CERTIFIED(R) network connection, featuring MIMO technology, supporting Acer SignalUp™ with Nplify™ wireless technology or
Intel(R) Wireless WiFi Link 5150 Wi-Fi(R)/WiMAX™ dual-mode module, …

Acer Aspire 5738PG Touch comes with these spec:
Operating System
Genuine Windows(R) 7 Home Premium