Concept:
SCSI is a hardware interface standard used for connecting computers with peripheral devices. It was widely used before modern interfaces such as USB and SATA became common.
Step 1: Identify the abbreviation given in the question.
The abbreviation is:
\[
\text{SCSI}
\]
Computer-related examinations frequently ask the full forms of common technical abbreviations.
Step 2: Expand each letter of the abbreviation.
The correct expansion is:
\[
\text{S} = \text{Small}
\]
\[
\text{C} = \text{Computer}
\]
\[
\text{S} = \text{System}
\]
\[
\text{I} = \text{Interface}
\]
Thus,
\[
\text{SCSI} = \text{Small Computer System Interface}
\]
Step 3: Understand its purpose in computer systems.
SCSI was designed to connect devices such as:
• Hard disks
• Scanners
• Printers
• CD-ROM drives
• Storage devices
It provided high-speed communication between a computer and peripheral devices.
Step 4: Choose the correct option.
Hence, the correct answer is:
\[
\boxed{\text{Small Computer System Interface}}
\]