Expand the mobile abbreviation SIM.

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Computer Aptitude - Computer Abbreviations

ASubscriber Identity Module

BSystem Identification Manager

CSubscriber Internet Mode

DSecure Identity Mechanism

Step-by-Step Solution

Step 1: Identify purpose
SIM stores subscriber identity and authentication data.
Step 2: Recall expansion
SIM stands for Subscriber Identity Module.
Step 3: Match correct option
Option A contains the correct expansion.
Final Answer:
Subscriber Identity Module → Option A
Quick Check:
SIM stores identity → correct.

Quick Trick: SIM = identity module.

Common Mistakes:

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