i wanted to see some videos from the following link related to analog ic design http://asic.postech.ac.kr/sub.php?code=CA1362357369255
but in lecture recording tab when i clicked on A, B, C or any thing, .gdb files start to download. but i dont know what information does it hold...I am not able to open it...actually i expected to see a video lecture...
i using windows XP.