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IBM produced a number of point of sale terminals, such as this 1985 IBM 4683 machine.
The 4860 system consists of a PC-based controller and thin client-based POS terminal, typically connected via a Token ring network.
The lightweight, for the time, IBM PC Convertible can be considered to be IBM's first laptop.
Released in 1986 the machine used a 4.77MHz Intel 8088 processor and came with up to 256KB of RAM, expandable to 640KB.
It came with a monochrome CGA-compatible LCD screen and twin 720KB 3.5-inch floppy disk drives.
In total the machine weighed less than 13 pounds or 6kg, thanks in part to its use of the latest surface mount technology to allow more components to be packed into a smaller area.
The IBM RT PC, known as the IBM 6150 in the UK, is based around IBM's ROMP processor. It was introduced in 1986 as the Risc Technology Personal Computer.
The machine ran IBM AIX, Advanced Interactive Executive, an IBM port of UNIX 1.x and 2.x but could also run the Academic Operating System (AOS) or Pick Operating System.
It was followed in 1990 by the IBM RS/600 and the POWER (Performance Optimisation with Advanced Risc) processor line, which was the basis for the PowerPC processor.