|Also Known As:||System 1|
|Original Creator:||Aurora Borealis|
|OS Personified:||Mac System Software 0.1-1.1|
|OS Developer:||Apple Inc.|
|First Released:||24 January 1984|
|Latest Stable Release:||v 1.1 14 April 1986|
A rather newly created OS-tan, OS1-tan wields a hammer, in reference to the 1984 Macintosh commercial. With silver eyes, black hair, a blood type of 16, and a commanding height of 125 cm [4'1], OS1-tan is an anti-conformist and a natural born leader, though she has a feisty disposition. She wears her hair in a side ponytail and a Happy Mac necklace. She is fond of 1980's fashion and speaks in Newspeak entirely, a reference to George Orwell's 1984, used in the first Macintosh commercial. She dislikes GEM-tan and is often seen with System 2-tan, who understand each other well.