  Exploiting both spin and charge of the electron in electronic micordevices
has lead to a tremendous progress in both basic condensed-matter research and
microelectronic applications, resulting in the modern field of spintronics.
Current spintronics relies primarily on ferromagnets while antiferromagnets
have traditionally played only a supporting role. Recently, antiferromagnets
have been revisited as potential candidates for the key active elements in
spintronic devices. In this paper we review approaches that have been employed
for reading, writing, and storing information in antiferromagnets.
