A siddur (Hebrew: סידור‎; plural siddurim) is a Jewish prayer book, containing a set order of daily prayers.

During times of prayer, a Siddur is used. Jews do not read through the entire prayer book at every service. Depending on the service, is the part of the Siddur which is used.

Jewish prayer is as ancient as the Hebrew Bible, for the Torah records that even the patriarchs prayed to God in times of distress or to give thanks. In late antiquity, the Rabbis of the Talmud established formal structures and blessings to be recited for the various worship services.

The siddur has long served as the single common spiritual and educational tool for Jews of all backgrounds. The variations in the siddur reflect the incredible diversity of the Jewish people over the span of tradition and the common text of all siddurim is itself an aggregate of thousands of years of creativity.

Online Siddurim:

• http://sidduraudio.com/ (Best with audio)
• http://www.onlinesiddur.com/ (One of the best ones for reading)
• www.virtualcantor.com
• http://www.tehilimhotline.org/

More to come.