If you have 1,000 cards and you are sorting on 6 columns, you have to pass all the cards 6 times, which means reading 6,000 cards. Is this O(N log N)? I know t

If you have 1,000 cards and you are sorting on 6 columns, you have to pass all the cards 6 times, which means reading 6,000 cards. Is this O(N log N)? I know this because I did it for a living when I started working in 1970.