BrainTrain developed this computerized cognitive training system to improve an individual's mental abilities in a wide variety of areas. The underlying training premise is that "practice makes perfect". The exercises may be conceptualized as a computerized "mental gym" providing a full range of mental exercise equipment. The exercises are designed to develop, improve, and remediate attention, concentration, memory, hand-eye coordination, fundamental numerical concepts and basic problem solving skills – cognitive skills which clinical research has shown can be enhanced through exercise and practice. The exercises are designed to help improve the functioning of individuals with ADHD, ADD, Learning Disabilities, Pervasive Developmental Disorder, Brain Injury, and Developmental Delays. The programs are highly enjoyable, range from very simple exercises to tasks, which will challenge the attention of a normal adult. Constantly improved and refined since 1985, Captain's Log is the most comprehensive cognitive training system ever developed!