"Scoreboarding" is also called "Thornton's Algorithm". Tomasulo's Algorithm and Thornton's Algorithm were developed around the same time with roughly the same goals.

• They are both dynamic scheduling methods.
• They both resolve dependencies (RAW, WAR, and WAW).
• They are both pipelined.
• They both have limited out-of-order execution capabilities.
• Neither was designed to be superscalar.
  Tomasulo's Algorithm, while solving dependencies better, was more complicated than Thornton's Algorithm.
  
  Reposted from http://invisiblegdev.blogspot.com/