Introduction:
SCSI stands for Small Computer System Interface. It is a set of standards that allows computers to communicate with peripheral devices such as hard drives, scanners, and printers. SCSI was originally developed in the 1980s and has since undergone several revisions to keep up with technological advancements.

Explanation:
The correct answer is option B, Small Computer System Interface. Let's take a closer look at why this is the correct answer:

Small Computer System Interface:
The term "Small" in SCSI refers to the fact that it was originally designed for small computers, such as personal computers and workstations. However, SCSI has since been adopted by a wide range of computer systems, including servers and mainframes.

Computer System Interface:
The term "Computer System Interface" describes the purpose of SCSI, which is to provide a standardized method for computers to communicate with peripheral devices. SCSI allows multiple devices to be connected to a single SCSI bus, and each device is assigned a unique address for identification.

Alternative Options:
Let's briefly discuss the other options and why they are incorrect:

a) Signal Computer System Interface: This option is incorrect because SCSI does not primarily deal with signal processing or transmission. While signals are indeed involved in the SCSI communication, the term "Signal" is not a part of the acronym.

c) Small Coding System Interface: This option is incorrect because SCSI does not relate to coding systems. SCSI focuses on the physical and logical connection between computers and peripheral devices, rather than coding or data representation.

d) Signal Coding System Interface: This option is incorrect for the same reasons as option a. SCSI does involve signals, but the term "Signal Coding" is not a part of the acronym.

In conclusion, SCSI stands for Small Computer System Interface, which is a set of standards that allow computers to communicate with peripheral devices. SCSI has been widely adopted and is still in use today, although it has been largely replaced by newer interfaces such as USB and Thunderbolt for consumer-level devices.