Retin-A (tretinoin) is a form of vitamin A that helps the skin renew itself. The Retin-A and Avita brands of tretinoin are used to treat acne. The Renova brand of tretinoin is used to reduce the appearance of fine wrinkles and mottled skin discoloration, and to make rough facial skin feel smoother. Retin-A may also be used for purposes not listed in this medication guide.
Waste Stream. The total flow of solid waste from homes, businesses, institutions, and manufacturing plants that is recycled, burned, or disposed of in landfills, or segments thereof such as the residential waste stream or the recyclable waste stream..
Stream is linear queue that connects a file to the program and maintain the flow of data in both direction. Here the source is any file, I/O device, Hard disk, CD/DVD etc. Basically stream is if two type 1.Text Stream 2.Binary stream. Text Stream : It is a sequence of character arranges in line and each line terminated by new line (unix). Binary Stream: It is data as it is coded internally in computer's main memory, without any modification.