Muffin 1.0 or Muffin Version 1 is the first operating system that Muffin released, in the year 1997. Glitches were most common in this OS, with the BSOD (Blue Screen of Death) and MEOW (Massive Error of Wow) causing sales to drop drastically. Dentor, the mastermind behind the software, did not give up and eventually made Muffin 1.1 the following year. Internet is not available in the computer, another factor that led to the low sale charts. At the time, it has one of the most advanced startup screens at the time.