Sample Welcome To Our Program Please Tell Me A Product Which Is Developed From Another Product. In Short, Product Development.?

Please tell me a product which is developed from another product. In short, product development.? - sample welcome to our program

I need a sample of products for our natural condition. Please help me and my friend! All ideas are welcome.
Ex: t-back in "T" before "was developed.
Each type of product you can imagine and think.
Thank you.