Data Type for "flags"

Hello all:
	I am new to PHP and PostgereSQL with some former experiences of ASP 
and MSSQL. My question is when I want to represent different types 
of object, or different status of object in my application, e.g. 
class of users, I used to use tinyint in MSSQL. But I found there is 
no such thing in PGSQL, so what should I use instead? integer, bytea 
,or bit(n)? I think integer will be the most convenient to use, 
isn't it?

Regards,
Ian

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