USB is the acronym in English of Universal Serial Bus (“Universal Port”, in Portuguese), a type of technology that allows the connection of peripherals without turning off the computer, as well as transmit and store data.
Peripherals are devices or cards that send and receive information from the computer, in connection to the CPU of the machine.
The most common examples are: Flash storage peripherals, printers, scanners, readers or writers of CDs and DVDs, card readers, mice, keyboards, webcam , etc.
Currently, most of these peripherals are connected to the computer via USB connection.
The current USB connections are the default PnP (Plug and Play or “Plug and Use”, in Portuguese), which helped reduce all the complication in setting of these devices, with the goal of facilitating the life of the user.
The USB standard was developed by a consortium of companies in 1995, among which include: Microsoft, Apple, Hewlett-Packard, NEC, Intel and Agere. However, the first “USB ports” only began to be used on computers manufactured from 1997.
It was very difficult for these companies find a consensus, so the opinions were divided and formed two distinct groups: UHCI (Universal Host Controller Interface) supported by Intel, and transferring part of the processing Protocol for the software.
Already the OHCI (Open Host Controller Interface) supported by Compaq, Microsoft and National Semiconductor, which transferred most of the effort to the electronic controller.
The universal symbol of the USB system is a Trident of Neptune (in Roman mythology was the god of groundwater and underwater). Theoretically, the different forms of the tips of the Trident-circle, triangle and square-would represent the variety of devices that could be supported by USB technology.
The first version was called USB 0.7, released in November 1994. This model could reach a maximum speed of 1.5 MB per second data transfer.
In 2009 was released the USB 3.0, also known as SuperSpeed, which features ability to transfer up to 625 MB per second.
Currently, all electronics are produced in order to fit the USB technology.
Read more: Abbreviation Finder