Many laboratory experiments have been conducted to study the creep (or deformation) of ice. These include measurements on the creep of single ice crystals by Glen and Perutz (1954), Steinemann (1954), Rigsby (1958), Readey and Kingery (1964), and Montagnat and Duval (2004); papers discussing the deformation of polycrystalline ice include Glen (1952), Steinemann (1958), Jonas and Müller (1969), Duval (1981), Mellor and Cole (1982), and Jacka and Maccagnan (1984). Extensive reviews on this subject can be found in Weertman (1973a), Hobbs (1974), Glen (1975), Hooke (1981), Budd and Jacka (1989), and Schulson and Duval (2009). Below, a short summary of the most important results is given. For most applications discussed in this book, this elementary review is sufficient; those readers who are interested in a more comprehensive discussion are referred to the in-depth treatment of this topic by Schulson and Duval (2009).