In the United States, milk products have to be listed as a potential allergy warning if the food contains them. Most manufacturers will individually include whey in the ingredient list as well, particularly if the product is not strictly considered a dairy product.
1960's Sowing the seeds of the calculator revolution. Early 1960's -- Mechanical calculators, slide rules, or paper and pencil are the world's main methods of calculation. As was true in the 1940's and 1950's, early 1960's calculators are complicated motor-assisted mechanical adding machines with no other electronic parts.
Also during this period were the first numbering systems. Around 100A.D. was when the first 1-9 system was created by people from India. However, it wasnât until 875A.D. (775 years later) that the number 0 was invented. And yes now that numbers were created, people wanted stuff to do with them so they created calculators.