37xx

37xx

IBM communications controllers that include the 3704, 3705, 3720, 3725 and 3745 models. The 3704 and 3705 are early units, and the 3745 models are newer and more versatile. The 3745 includes a cluster controller that can connect 512 terminals, eight token ring networks and 16 T1 lines.
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The markings on the left side of the slide say "Mauser-Werke Oberndorf Gmbh, Oberndorf/Neckar, Mod HSc, Made in Germany." The serial number reads "37XX of 5000." The markings on the right side of the slide repeat the serial number "37XX of 5000." At the extreme right end of the slide on the right side is an American Eagle.
The transportation Standard Industrial Classifications (SIC 37XX) led other industries, paced by aerospace producers.