noun

• A person or entity engaged in the creation or improvement of certain classes of products.
• A real estate developer; a person or company who prepares a parcel of land for sale, or creates structures on that land.
• A film developer; a person who uses chemicals to create photographs from photograph negatives.
• A liquid used in the chemical processing of traditional photos.
• (dyeing) A reagent used to produce an ingrain color by its action upon some substance on the fiber.
• (computing) A software developer; a person or company who creates or modifies computer software.