ICA

1. Institute of Chartered Accountants (ICAEW of England and Wales; ICAI of Ireland)
2. Institute of Contemporary Arts
3. Invalid Care Allowance (now replaced by Carer's Allowance)

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• Petty Bag
• petty bourgeois
• petty bourgeoisie
• petty cash
• petty-chaps
• petty constable
• petty juries
• petty jury
• petty larceny
• petty officer
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• petty serjeanty
• Petty Sessions
• petty treason
• petty whin