The minor tractates (Hebrew: מסכתות קטנות, masechtot qetanot) are essays from the Talmudic period or later dealing with topics about which no formal tractate exists in the Mishnah. They may thus be contrasted to the Tosefta, whose tractates parallel those of the Mishnah.
Each minor tractate contains all the important material bearing on a single subject. While they are mishnaic in form and are called "tractates," the topics discussed in them are arranged more systematically than in the Mishnah; for they are eminently practical in purpose, being, in a certain sense, the first manuals in which the data scattered through prolix sources have been collected in a brief and comprehensive form.
There are 7 minor tractates. These short rabbinic texts each focus on a single topic of Jewish law. While much of their content is also found in the Mishnah, Tosefta, or Talmudic sources, they also include unique material not found elsewhere. Their name and form suggest that they originated in the period of oral tradition which was dominated by the Talmud and the Midrash, so that these treatises are doubtless of great antiquity, some of them having been compiled in their main outlines before even the final redaction of the Talmud in the 6th century.
In addition to the seven Minor Tractates, there are seven external tractates—texts not part of the official Mishnah canon. They vary in style and origin, with most material dating to the Tannaitic period and some later additions. Though not widely valued in early rabbinic circles, they were occasionally used in halakhic discussions and contain unique content not found elsewhere.