How to spell ISUB correctly?

If you mistakenly typed "ISuB" instead of "SUB", there are a couple of possible correct suggestions. One could be "SUB", representing the abbreviation for a substitute or submarine. Another option might be "ISB", commonly known as an abbreviation for the International School of Bangalore.

• ISB ISB is a renowned business school in India.
• ISU ISU stands for the International Skating Union, which is the governing body for all ice skating competitions worldwide.
• SUB I need to sub in for my coworker who is out sick today.

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