Conceptually, spending from the various categories generates an equal amount of income, which we divide into separate categories also.

FORBES: The Income Side of GDP

Within each category, all items of income and loss must be allocated similarly, though separate categories can be allocated differently among members.

FORBES: Business Return Due Dates

The section on ethnic groups has also been expanded from 2001, with separate categories for "Gypsy or Irish Traveller" and "Arab" for the first time.

BBC: 2011 census questions published

Revocable and irrevocable trust accounts are two more separate categories.

FORBES: Magazine Article

Labour MPs and MEPs, party members and members of affiliate organisations are all balloted individually and the results from the separate categories each make up a third of the final result.

BBC: Rules for Labour leadership election explained

Mr Ford also confirmed that Northern Ireland's high security prison at Maghaberry, near Lisburn, will be reconfigured to become three separate facilities dealing with different categories of offenders.

BBC: New prison to be built at Magilligan, County Londonderry

Team members learn how to separate their thinking into six distinct categories.

FORBES: IBM To Buy Green Hat

The existing 14 categories of merchandise (separate licences to sell each one of them) will be replaced by a simple distinction between shops that sell food and shops that do not.

ECONOMIST: Italy

The transportation bill, now in its ninth extension, is a critical piece of infrastructure legislation that consolidates more than 100 separate programs into just five major investment categories (for efficiency) and establishes performance standards for these investments (no more "Bridges to Nowhere").

CNN: STORY HIGHLIGHTS