The 71-year-old has become the most successful club boss in England with two Champions League wins, 13 Premier League trophies, five FA Cups and four League Cups all included in his haul at the club.
The Glaswegian succeeded Ron Atkinson at Old Trafford in November 1986 with United struggling at the foot of the old First Division table.
The interview included here with BBC commentator Barry Davies was done on his first day at United. Even then, his thoughts are with his predecessor, who was sacked after the team were knocked out of the League Cup in a 4-1 Southampton victory.
Ferguson also outlines his surprise and excitement at taking over at Manchester United and also underlines how the players at the club have to understand the thoughts of the supporters.
Ferguson, who was 44 when he was appointed at Old Trafford, would go on to phenomenal success with Manchester United, breaking Liverpool's previous record of 18 league titles in 2011 before adding a 20th championship this season.