None of the options (the airplane, the rocket ship, vaccines, or mosquito nets) are direct developments that resulted specifically from the invention of the first computer. The first electronic computers, developed in the mid-20th century, primarily influenced fields like data processing, automation, and computing technology itself. While computers have played a significant role in the development of technologies across various fields, the specific inventions listed are not direct outcomes of the first computers.
If you are looking for an answer that best reflects indirect influences or advancements in technology due to computers, please provide additional context.