Computer 
To dream of a computer represents the expertise, knowledge, and progression of today's world. You are being offered new possibilities and options. This dream may also symbolize your desire to break free from conformity and be able to exude your own personality. You tend to follow the group without offering your ideas or suggestions. You are too passive. Perhaps you feel inferior and unimportant in your role.
To dream that your computer has a mind of its own implies that you fear being unorganized and unable to manage aspects of your life. You may feel burdened and pressured by others and unable to determine your own actions.
To dream that a computer has a virus indicates that there is some aspect of your life that you cannot dominate.
Dressing
To dream that you are having trouble getting dressed suggests that a malicious individual will take up your time and attention so much so that you will be unable to enjoy the better aspects of life.
To dream that you are wearing white indicates that you will have a long life with abundant health and happiness.
Envelope
To dream about envelopes suggest a chance or favorable time for something. If the envelopes are unopened, then this represents sadness and chances that have passed you by.
Internet
To dream about the internet signifies your need to connect to a bigger group of people. This also tells of how communication has become very important to you.
Saltpeter
If you dream about saltpeter can indicate that you are about to enter a low period in life and experience incredible sorrow and heartache.
Smuggling
To dream that you are smuggling something implies that you are attempting to obtain something that you believe belongs to you. Someone or something is prohibiting you from collecting something that you are entitled to. Pay attention to the item you are smuggling as this may hold further symbolism.
Spaghetti
To dream of seeing or eating spaghetti implies that you feel trapped in a situation involving someone else. It's possible that you want to move on but aren't sure of which procedure to use. This issue is making you feel awkward.
Stoplight
To dream of a stoplight indicates that someone or something is preventing you from achieving your objectives. Perhaps you want to excel beyond your capabilities for fear of not advancing. If the stoplight is green, then this implies that the direction or goals that you are following are acceptable.