Which parties have traditionally governed Austria?

The people of Austria are voting later today in a general election, which is widely expected to produce a return to power for center-left and center-right parties that have traditionally governed the country.  The poll was called after internal divisions within the ultra-nationalist Freedom Party led to the collapse of its ruling coalition with the conservative People’s Party in September. With heavy losses predicted for the Freedom Party, the Social Democrats and the conservative People’s Party are neck-and-neck for first place.