Complex sentence: The Calculator appeared first as a desk accessory in first version of Macintosh System for the 1984 Macintosh 128k and was maintained with the same basic math operations until the final release of classic Mac OS in 2002.
Split into simpler sentences: The Calculator appeared first as a desk accessory in first version of Macintosh System for the 1984 Macintosh 128k. Its design was maintained with the same basic math operations until the final release of classic Mac OS in 2002.