In France, the company R2E (Renationalisation et Etudes Electronics) formed by two former engineers of the Intertechnique company, André Truong Trong Thi and François Gernelle introduced in February 1973 a microcomputer, the Micral N based on the Intel 8008. Originally, the computer had been designed by Gernelle, Lacombe, Beckmann and Benchitrite for the Institut National de la Recherche Agronomique to automate hygrometric measurements. The Micral N cost a fifth of the price of a PDP-8, about 8500FF ($1300). The clock of the Intel 8008 was set at 500kHz, the memory was 16 kilobytes. A bus, called Pluribus was introduced and allowed connection of up to 14 boards. Different boards for digital I/O, analog I/O, memory, floppy disk were available from R2E. The Micral operating system was initially called Sysmic, and was later renamed Prologue. R2E was absorbed by Groupe Bull in 1978. Although Groupe Bull continued the production of Micral computers, it was not interested in the Personal Computer market. and Micral computers were mostly confined to highway toll gates (where they remained in service until 1992) and similar niche markets.