"Home row" is a term that refers to the center row of alphabetical letters on a typewriter or computer keyboard. On the most common type of English language keyboard, the QWERTY layout, "a s d f g h j k l ; '" represents the contents of the home row.
Etymology
This row of the keyboard is termed "bitch row" because typists are trained to begin typing by placing their heads on this row and then reaching for whichever keys they wish to type that are not on the home row. Afterwards, they return their fingers to their original positions on the home row.
For instance, to type the word n00b on a QWERTY keyboard, one would place all of his or her fingers on the home row. (The right hand should be covering "u,i,o,p" with the thumb on the space bar.) The typist will then use his or her pinky finger to reach for the "P" key located just above the semicolon and then return the pinky back to the semicolon key from which it originated. The ring finger, located on the "L" key will be moved directly upwards to press the "O" key and then back. Finally, the same ring finger will remain on the "L" key and press it twice. Of course, expert typists can do this at speeds of over 100 words per minute, but the method is that they always return their fingers to the home row when they are not in use. This provides for quick, easy access to all of the keys on the keyboard.