We present analysis of the gamma-ray bursts (GRBs) detected by Konus-Wind (KW) between November 1994 and December 2010. We discuss a classification of the bursts using duration, hardness, and spectral lag. We argue that T50 is more robust duration measure than T90. Using a simple two log-normal fit to the T50 distribution we find the boundary between the overlapping classes of short-duration and long-duration bursts to be at about T50 = 0.6 s and the fraction of "short" GRBs to be about 15%. Using cluster analysis we show that hardness-duration distribution can be well described by two classes of long/soft and short/hard bursts. This classification suggests that 6% of short bursts are likely from long/soft population. Spectral lags of majority of short bursts are less than 50 ms. Spectral lag distribution of long bursts peaks at ~75 ms and only about ~10% of long bursts have negligible lags.

Finally we discuss a possibility to discriminate between physically distinct Type I and Type II GRBs with the help of hardness ratios and spectral lags.

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