Oanda, difference btw units and lots?

I established an account with Oanda, but there is no lots, only units, what is different? and i would like to know how can i choose my initial capital?

thanks ;-)

Oanda uses units. You can trade with 1 unit if you wish.

100,000 units is one standard lot or $10 a pip on EU.

You can manage your capital by logging into your money management control panel.

Thanks this helped me ;-)