Ключевые слова: abstract, access, achievement, alternative, ambition, answer, background, business, businessman, challenge, choice, choose, concept, decision, door, freedom, future, hacker, hole, idea, illustration, key, keyhole, light, lock, man, metaphor, open, opportunity, person, photo, possibility, privacy, problem, question, safety, security, seek, solution, solve, solving, strategy, success, symbol, trouble, troubleshooting, unlock, way, way out, work,