What is the missing number?

The top six reasons computers must be female:

6. As soon as you have one, a better one is just around the corner.

5. No one but the creator understands the internal logic.

4. Even your smallest mistakes are immediately committed to memory for future reference.

3. The native language used to communicate with other computers is incomprehensible to everyone else.

2. The message "Bad Command or File Name" is about as informative as

"If you don't know why I'm mad at you, then I'm certainly not going to tell you".

AND THE NUMBER ONE REASON COMPUTERS ARE FEMALE:

As soon as you make a commitment to one, you find yourself spending half of your paycheck on accessories for it.