Last year, an online video showed a 1-year-old girl touching a magazine as if it were an iPad. She swiped it with her fingers to turn the pages and did a pinching motion to enlarge the images, but to no avail.
Aside from being cute and amusing, the clip underscored the evolution of touch -- how we interact with technology. Whether it's the electric typewriter, the computer mouse or a motion-sensing gaming system, the ever-changing ways in which we control our devices can greatly affect how we work, play and do everything in between.
Here's a sample of some notable innovations during the past half-century.