What is aet?

Some articles on aet:

Hesse Cup - Cup Finals
5–0 1951–52 FC 04 Oberursel SG Gelnhausen 3–1 aet 1952–53 SV 07 Nauheim SpVgg Neu-Isenburg 2–12 1953–54 not held 1954–55 CSC 03 Kassel FC Union Niederrad 2–1 1955–56 not. 1968–69 Eintracht Frankfurt II SV Hermanstein 3–2 aet 1969–70 SG Westend Frankfurt FV 09 Breidenbach 4–2 1970–71 Rot-Weiß Frankfurt SV Darmstadt 98 3–2 aet 1971–72 VfB Gießen TSV Wabern 4–1 aet 1972–7 ... FC Eschborn 2–1 aet 2005–06 Wiesbaden, 3 June 2006 SV Darmstadt 98 FSV Frankfurt 2–1 2,500 2006–07 Hanau, 6 June 2007 SV Darmstadt 98 KSV Klein-Karben 3–0 1,246 2007–08 Darmstadt, 28 May 2008 SV ...