There really isn't one,but jigsaws are generally used for more detailed work.Saber saws usually have slightly larger blades.It's mostly a matter of semantics.
Obviously A router is NOT a saw. -To cut patterns use a jig saw or a scroll saw.
Sinbad Jr- - 1965 Jig Saw Phantom was released on: USA: 1965
Ace Hardware
1946
I'm not being smart, a backstroke saw. There are Japanese saws that cut both ways. There is a blade for a jig saw that cuts on the up stroke for cutting laminate from underneath so it doesn't chip.
another name 4 a fret saw is a jig saw it is a true fact
angle grinder circular saw jig saw etc
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A sabre saw is a variety of portable electric jigsaw.
The scroll saw is often called a 'jig-saw' in places other than north America.
you can make a wooden puzzle using a jig saw (hence "jig saw puzzle") also, i have seen kits where the blank puzzle is precut and you just draw or paint on it.
the element of surprise, remember in saw 1 they went to his lair and shot him