Parallel Communication Protocols并行通信协议
Parallel communication protocols for data include the IEEE-488 protocol, and the Centronics protocol has been widely used for printers. 用于数据的并行通信协议包括IEEE-488协议，而Centronics协议已被广泛用于打印机。
Note: This is just a place-holder location for future development. Very little has been done with it to date. 注意：这只是为未来开发预留的位置。截至目前，这里几乎没有任何进展。
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IEEE-488 ParallelIEEE-488 平行
Hewlett-Packard developed a communication bus which has become the industry standard for laboratory use. It is also known as the GPIB (General Purpose Instrumentation Bus) or the HPIB (Hewlett-Packard Instrumentation Bus). It is a 24 line bus with the following allocation of lines: 16 bi-directional lines (8 data lines and 8 control lines) and 8 additional lines for logical ground returns and shielding. It can connect up to 14 instruments with a computer and operate at a data rate as high as 1 MB per second. Hewlett-Packard 开发了一种通信总线，已成为实验室使用的行业标准。它也被称为 GPIB（通用仪器总线）或 HPIB（Hewlett-Packard 仪器总线）。它是一种 24 线总线，其线的分配如下：16 条双向线（8 条数据线和 8 条控制线）以及 8 条额外的线用于逻辑接地返回和屏蔽。它可以连接最多 14 个仪器并与计算机通信，并以每秒 1 MB 的数据速率运行。
Most manufacturers of research equipment which communicates with a computer offer IEEE-488 devices. Such devices can be classified as 1) listen only, 2) talk only, 3) talk-listen and 4) talk-listen-control. 大多数与计算机通信的研究设备制造商都提供IEEE-488设备。这类设备可以分为四类：1) 仅监听，2) 仅发送，3) 可发送和接收，4) 可发送、接收和控制。
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Centronics Parallel ProtocolCentronics并行协议
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