Who is a Non-Resident Indian (NRI)? 
A
 non-resident Indian (NRI) is an Indian citizen or a person of Indian 
origin who stays abroad for employment, business or vocation outside 
India, or stays abroad under circumstances indicating an uncertain 
duration.
 
 Who is a Person of Indian Origin (PIO)?
A
 Person of Indian Origin means a citizen of any country (other than 
Bangladesh or Pakistan), if the person: (a) at any time held an Indian 
passport; or (b) or the persons parents or grandparents were citizens of
 India; or (c) is a spouse of an Indian citizen, or of a person referred
 to in (a) or (b) above.
Other terms with 
vaguely the same meaning are overseas Indian and expatriate Indian. In 
common usage, this often includes Indian-born individuals (and also 
people of other nations with Indian ancestry) who have taken the 
citizenship of other countries.
According to 
Ministry of Overseas Indian Affairs, India has the second largest 
diaspora in the world after Overseas Chinese . The overseas Indian 
community estimated at over 25 million is spread across every major 
region in the world.
Who is a Foreign Institutional Investor (FII)?
An
 FII is an institution established or incorporated outside India which 
proposes to invest in Indian securities and is registered with SEBI.
Who is an Overseas Corporate Body (OCB) ?
An
 OCB includes overseas companies, partnership firms, societies and other
 corporate bodies owned predominantly by non-resident persons of Indian 
nationality or origin outside India.
Can an NRI maintain a bank account in India?
Yes. NRIs can maintain accounts in rupees as well as in foreign currency.
What types of rupee accounts may NRIs maintain?
There are 4 types:
1. Non-resident (External) Rupee Accounts (NRE)
2. Non-Resident (Special) Rupee (NRSR) Account
3. Ordinary Non-resident Rupee Accounts (NRO)
4. Non-resident (Non-repatriable) Rupee deposit accounts (NRNR)
What are NRE, NRO and FCNR accounts? 
Non-Resident
 (External) Rupee (NRE). This is a Rupee account from which funds are 
freely repatriable. It can be opened with either funds remitted from 
abroad or local funds which can be remitted abroad.
Non-Resident 
Ordinary Rupee (NRO). This is a Rupee account and can be opened with 
funds either remitted from abroad or generated in India. These funds are
 non-repatriable. However, under certain circumstances, these are 
allowed to be repatriated.
Fully Convertible 
Non-Resident Rupee (FCNR). This account is similar to the NRE account 
except that the funds are held in foreign currencies and can be 
maintained in Pound Sterling,U.S. Dollar, Euro and Japanese Yen. FCNR 
accounts can be maintained only in the form of term deposits, i.e. a 
deposit kept for fixed periods ranging from 6 months to 3 years.
How do NRE, NRO and NRSR accounts differ? 
Balances
 held in NRE accounts can be repatriated abroad freely, whereas funds in
 NRSR and NRO account cannot be normally remitted abroad but have to be 
used only for local payments in rupees. Consequently, funds remitted 
from abroad or local funds which can otherwise be remitted abroad to the
 accountholder can only be credited to NRE accounts.
