  Short and long bursts were identified by the BATSE team in the early 90s. A
decade ago there were some suggestions about the intermediate duration type of
bursts. We are going to summarize recent analyses of the duration distributions
of the Beppo-Sax and Swift data. Our conclusion is all the three satellites
(CGRO, Swift, Beppo-Sax) can see the third type of the GRBs. The properties of
the group members are very similar in the different data sets.
