Grep is a command used in Linux, UNIX and Unix-like operating systems to search text, files or any document for a user-specific pattern, a string of text or a matching character. It displays the matching line on the screen that contains the searched object/objects. Grep is one of the most powerful commands on operating systems like Unix or Linux.
IEEE 488 is a digital communications bus specification invented by Hewlett Packard and used to connect short range communication devices. This term is also known as the general purpose interface bus (GPIB) or the Hewlett Packard interface bus (HP-IB).
In the 1960s, Hewlett Packard developed IEEE 488 to easily interconnect controllers and instruments. As a short range communication bus, IEEE 488 was easy to connect and configure. The IEEE 488 has a 24-pin connector and is used for double headed design. Both ends of the cable are used, male on one side and female on other side. The IEEE 488 has 16 signal lines. Eight lines are dedicated for bi-directional communication, five lines are used for bus management. The remaining three lines are dedicated for handshakes. This allows 15 devices to be shared over a single physical bus.
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