能否介绍一下IBM Thinkpad系列的笔记本电脑？

ThinkPad 500 series

The 500 series (500, 510, 560(E, X, Z), 570(E)) were the main line of the ultraportable ThinkPads. Starting with the 486SX2-50 Blue lightening to the Pentium III 500, these machines had only a hard disk onboard. Any other drives were external (or in the 570's case in the ultrabase).

ThinkPad 600 series

The 600 series (600, 600E and 600X) are the direct predecessors of the T series, and are legendary for their portability and sturdy construction. The 600 series packed a 12.1" SVGA or a 13.3" XGA TFT LCD, Pentium MMX, Pentium II or III processor, full sized keyboard, and optical bay into a package weighing roughly 2.3 kg (5 lb). IBM was able to create this light, fully featured machine by using lightweight but strong carbon fibre composite plastics.

ThinkPad 700 series

The 700 series (700, 701, 730 (tablet), 750, 755, 760, 765, 770 (many with sub-models)) were the cutting edge Intel-based ThinkPads. They featured the best screens, largest hard drives and fastest processors available at the time.

701外号“Butterfly”(蝴蝶)，因为它的键盘为了能够塞进较细小的空间而分成两部分。当它收藏时，会上、下移开塞进电脑内，到打开时又会左、右展开，就像蝴蝶展翅一样。

ThinkPad 800 series

The Power PC ThinkPad series, (800/820/821/822/823/850/851/860) were unique in that they ran on the PowerPC architecture, and not the x86 architecture. They all used the PowerPC 603e CPU, at speeds of 100MHz, or 166MHz in the 860 model. The 800 may have used a 603, and it is unclear if the 800 was experimental or not. All units used SCSI 2 instead of IDE. The units are believed to have all been extremely expensive, as the 850 cost upwards of ,000 USD. The 800 series can run Windows NT 3.5 (probably 4.0 as well), OS/2, AIX 4.14, Solaris Desktop 2.5.1 PowerPC Edition and possibly Linux.

ThinkPad Transnote

The IBM Transnote was a pen based PC in a notebook. Data could be entered through the keyboard, TrackPoint, paper notepad (with writing sensor below), or the screen via stylus. This ThinkPad expanded on IBM's previous pen based notebooks (360P(E), 730T(E), and 755(P)).

ThinkPad T2x series (T20, T21, T22, T23)

Pentium III Mobile, sub-5 lb (2.3 kg) class machines. Contained processors ranging from 0.18 micrometre PIIIM 700 MHz to 0.13 micrometre PIIIM 1 GHz. Typically had 14.1 inch XGA screens, Ultrabay 2000 optical drives, S3 Savage/IX-MV graphics chip and Cirrus Logic CS 4614/22/24 sound chips; although variations along the line existed. Introduced the Thinklight, a LED mounted inside the upper screen lip and illuminating the keyboard (activated with Fn-PgUp, the extreme diagonal keys); and titanium-reinforced screen lids. Used miniPCI form factor cards, which could be modem and/or ethernet. With the T23, an internal wi-fi antenna became available, so wi-fi miniPCI cards could be used. Did not contain the active hard drive protection, or touchpad & trackpoint combination pointing devices which appeared in later models. T series ThinkPads were clad in black non-slip rubber with embedded glitter. The case lid had tabs along the edge that interlocked with depressions in the lower case when closed, to reduce case flexing. Comparatively more stylish, functional, and rugged machines; and easy to disassemble for repair or upgrades.

ThinkPad T3x series

Solely includes the T30 model. Features include an Intel Mobile Pentium 4 processor ranging from 1.6 GHz to 2.4 GHz. Graphics were provided by a Radeon 7500 driver running on 16 MB of discrete video memory. The T30 was available with a 14.1 inch screen, with resolutions of 1024 x 768 and 1400 x 1050. Features available include the imbedded security subsystem, UltraNav touchpad, 256MB standard memory, a 20, 40 or 60GB hard disk, Ultrabay Plus drive, wireless, and Bluetooth. The shell is titanium reinforced composite. The whole package was a bit heavier and thicker than the T4x series.

ThinkPad T4x series