first appeared in 1949

"First appeared in 1949" indicates that a particular idea, invention, or event was introduced or became known to the public in the year 1949. It signifies the starting point or initial recognition of something new. For example, if a technology or a publication is said to have "first appeared in 1949," it means that was the year it was created, published, or made available, marking its debut or the beginning of its presence in history.