The massive brand power of IBM at that time was the largest factor in the PC's eventual dominance. Computing critics complained about the relatively primitive hardware ("off-the-shelf components") of the PC but admitted that it would be a success simply due to IBM's mindshare. By the time Lisa was available in the market, the less-expensive and less-powerful IBM PC had already become entrenched. The x86 platform's backward compatibility with the CP/M operating system was helpful for the PC, given that many existing business software applications were originally written for CP/M. Apple had attempted to compete with the PC, via the Apple II platform. DOS was very primitive when compared with the Lisa OS, but the CLI was familiar territory for most users of the time. It would be years before Microsoft would offer an integrated office suite.