Here is a summary of the prevailing characteristics of each American generation born starting in 1900 and ending with the generation born since 2001: "The Six Living Generations In America."
This author, though, says that generational characteristics are not sharp between generations, and hence "here is a 'fuzzy' consensus on the characteristics of each generation" X, Y and Z.
The American Management Association offers its own summaries of the generations related to the workplace, "Leading the Four Generations at Work."
This is a brief summary of "Members of each generation: perceived characteristics."