The ones I'm aware of (In the US) are General Partnership,
Limited Partnership (LP), Limited Liability Partnership (LLP), and
Limited Liability Limited Partnership (LLLP)
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A limited partnership takes place when all partner are
limited.
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The maximum income allowed from a limited partnership in an IRA
is $1,000 per year. Under the IRA, a limited partnership is
entitled a master limited partnership or MLP.