What's the difference between jam and conserve?

It appears to be a little fluid, but according to The Nibble, it is as follows:

“Jam: Jam is made from crushed or chopped fruit cooked with sugar, and often pectin and lemon juice. Jam can be a purée of fruit or have a soft pulp, but it does not Wine Jellycontain chunks of fruit.

Conserve: Conserve is a generally mixture of more than one fruit, often with added nuts and raisins, that is cooked until it becomes thick. It is used as a spread for breads, pastries and meats, and in the latter use is closest to chutney. Other producers refer to a thickly-stewed preserve as a conserve. Tomato conserves can be more savory.”

There is also strawberry preserves, just to muddy the waters. It seems to be interchangeable with marmalade or jam.