Computers Communication Business ListingsBusiness Directory for Chicago, Illinois. This local business directory features all types of computers and electronics including audio equipment, home entertainment, video equipment, cellular phones, photography, printers, copiers, computers, computer accessories, video games as well as used equipment. Looking for information about computers and communications? Our online listing for computer services, computer equipments, communication services and equipments, interment information system and many more.
Before the advent of computer networks that were based upon some type of telecommunications system, communication between calculation machines and early computers was performed by human users by carrying instructions between them. Many of the social behavior seen in today's Internet was demonstrably present in nineteenth-century telegraph networks, and arguably in even earlier networks using visual signals.