On the following sites you find scientific terms and their explanations, which may help you understanding the language of attosecond science. One of the most important terms is certainly the atto dimension:

For once it´s not the Greeks we have to thank for the origin of the prefix 'atto' - but the Scandinavians. In Danish and Norwegian, "atten" means 18. In the decimal system the word "atto" is used as a prefix for a number that has 17 zeros after the decimal point; the 18th digit is then a number above zero. In mathematics it is referred to as 10-18. An attosecond therefore lasts for just a billionth of a billionth of a second – or a thousandth of a femtosecond 10^{-15}. The wing beat of a fly is a million billion times slower.

Light travels at nearly 300.000 kilometres per second. In the space of an attosecond, however, it covers a distance not much more than a couple of billionths of a millimetre. Or the length of three hydrogen molecules put end to end. Expressed another way, an attosecond is to a second, what a second is to the age of the universe - which as we know is around 13.7 billion years old.