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Announced in October 1990, the IBM PS/2 Model 95 could be powered by a number of processors, from a 20MHz Intel 486 to a 90MHz Intel Pentium.
The model 95 has a fully interchangeable processor complex motherboard: containing the processor, memory controller and micro channel interface. It has a 32-bit Micro Channel Architecture bus.
The machine supports from 8MB to 64MB of DRAM, in eight 72-pin sockets.
The SCSI adapter can support both internal and external devices, such as hard disks, tape drives and CD drives.
The IBM Personal System/2 L40 SX laptop PC was announced in 1991.
A replacement for IBM's earlier IBM PC Convertible laptop, it was powered by an Intel 386SX 20MHz processor. In spite of being a PS/2 (which were mostly micro channel architecture) it had a PC AT bus.
It could support between 2MB and 18MB of RAM, had one 3.5-inch floppy drive and a 60MB hard disk. An illuminated VGA monochrome LCD screen served as its display.
The PS/2 LX 40 SX was later superseded by the successful IBM ThinkPad range of machines.
In 1992, IBM announced a new series of notebook computers — the ThinkPad.
Featuring a distinctive black case and a TrackPoint pointing device in the middle of the keyboard, the ThinkPad won more than 300 awards for design and quality.
The name comes from the small flip open notebook carried by IBM customer engineers to jot down reminders. The pads had "IBM" embossed in gold letters on one side and "THINK" on the other, and were known as "Think Pads" by the engineers.
This is an early example of a ThinkPad, a model 720. The machine is powered by a 50MHz 486 SLC CPU, can support up to 16MB RAM and a 120MB hard disk.
The display is a 9.54-inch LCD screen with a 640x480 resolution.