Although Jobs and Wozniak have become known as two of the most brilliant innovators in the technological revolution, not all of their 1___ were as successful as the Apple I and the Apple II. They 2___ the Apple II Plus in 1980 when they 3___ that small businesses would have a need for a more professional and integrated system than the Apple I or II. The Apple II Plus was an 4___ version of the Apple II that they aimed at the small business 5___ . Unfortunately, they did not withstand the 6___ of the IBM Personal Computer. Although IBM was not the original 7___ of the personal computer, they had been the leader in the business machine industry for several decades, and they soon 8___ as the primary competition in the personal computer 9___ IBM had many advantages over Apple: their engineering was done by a more experienced engineering staff, and their advertising was done by their more experienced 10___ staff. Since Apple had been so successful with the Apple I and the Apple II, the failure of their 11___ with the Apple II Plus was both 12___ and disappointing.