Less than 20,000 mainframes were sold in the world yearly and IBM dominated this relatively small market (to a lesser extent UNIVAC, GE, NCR, CDC, RCA, Burroughs, and Honeywell - the "Seven Dwarfs" to IBM's "Snow White").
ຫນ້ອຍກ່ວາ 20,000 ຮູບແບບຫລັກຖືກຂາຍໃນແຕ່ລະປີໃນໂລກ, ແລະ IBM ຄອບ ງໍາ ຕະຫລາດຂະ ຫນາດ ນ້ອຍນີ້ (ໃນລະດັບທີ່ ຫນ້ອຍ ກວ່າ UNIVAC, GE, NCR, CDC, RCA, Burroughs ແລະ Honeywell - "ເຈັດເດັນດີ້" ຂອງ IBM's "Snow White").