Here is just one example: Single-celled marine plants produce fully half of all the oxygen in our atmosphere.

FORBES: Is the Great Barrier Reef Doomed? One of the World's Leading Coral Scientists Thinks So

For example, a "single account" is one account category that includes deposits in checking, savings accounts, money market deposit accounts and time deposits such as certificates of deposit (CDs).

FORBES: Magazine Article

In one example, insurers and Medicare switched to identifying every doc by a single number rather than having a different one for each plan.

FORBES: Magazine Article

They didn't join up to spend, for example, as one policeman recently told me, four hours processing a single prisoner through custody.

BBC: News Online

Ten tracks are up for best single, including Example's Changed The Way You Kissed Me, One Direction's What Makes You Beautiful and The Military Wives' number one, Wherever You Are.

BBC: Ed Sheeran leads Brit nominations