Hoping to persuade IBM that its move into the mass market with the PS/1 was a ghastly mistake, Smith Corona Corp, 48% owned by Hanson Plc, has now introduced the home computers foreshadowed when it announced a few months back that it was going into partnership with Acer Group of Taiwan. Describing the seven models as simply smart, the New Canaan, Connecticut company says it is aiming them at home, student, small business and home-office users. All contain built-in applications and an opening PowerUp Menu Screen, and application and operating system software are pre-loaded onto a ROM cartridge or hard disk. ROM cartridge models have Smith Corona Word Processing 6.0, Desktop Reference and MS-DOS 4.01, the hard drive models add Microsoft Works 2.0. All but one use the 80286, the PC 100, 110 and 120 use ROM cartridges, the hard disk models are the 200, 210, 220 and 320, the last using the 80386SX. The ROM models have 640Kb and 12MHz CPU, the Winchester is 40Mb, and the top 80286 model has 16MHz clock and up to 5Mb. The 80386SX model has 1Mb to 8Mb and 20MHz CPU. They are being made at Smith Corona’s Cort land, New York manufacturing plant.