Computer-based safety training is becoming more common and is being delivered to an increasingly aging workforce. Aging results in a number of changes that make it more difficult to learn from certain types of computer-based training. Instructional designs derived from cognitive learning theories may overcome some of these difficulties.Three versions of computer-based respiratory safety training were shown to older and younger workers who then took a high and a low level learning test.Younger workers did better overall. Both older and younger workers did best with the version containing text with pictures and audio narration.Computer-based training with pictures and audio narration may be beneficial for workers over 45 years of age.Computer-based safety training has advantages but workers of different ages may benefit differently. Computer-based safety programs should be designed and selected based on their ability to effectively train older as well as younger learners.