How Many Countries Include in European Countries

How many countries are including in “European Community". Please shortly brief in this regard,an other general question,sir, what is difference between organization, company, firm and corporate.It is true that all the organization, company, firm and corporate same function. Such as some organization attached to manufacturing business, some companies attached to trading business, and some firms attached with service business.

The six founding countries were France, West Germany, Italy, Belgium, Netherlands and Luxembourg.  Later Denmark, Ireland, United Kingdom, Greece, Spain and Portugal also joined in. By 2007 fifteen more countries joined in.
As far as your other question is concerned corporate, firm, organization and company are all used synonymously. All these words can be used for any such business concern which may be involved in a manufacturing business, trading business or service business.