A baby stroller is a mode of infant transport meant to be pushed. The term "stroller" is used in America, while "buggy" is used in British English. With these little vehicles, the child is kept in a seated position, usually face forward.
Originally, the baby stroller in the United Kingdom was known as the pushchair from its invention until the early 1980s. At this time, the more compact design which would be known as the "buggy" became the trend. The term pushchair may still be used, however it is becoming less and less common.
A baby stroller can provide quite a bit of versatility. Many collapse into an easily stored form for when they are not in use. Others can be converted between designs. For instance, they may be configured so that a young child can lie down then altered to better suit a child in a forward facing position.