640K

640K

(640 Kilobytes) In the early days of PCs, 640K referred to the first 655,360 bytes of memory, known as "conventional memory." It was all the RAM that could be used for applications, although techniques were used to squirrel away drivers and other small programs into the upper memory areas. See conventional memory, PC memory and PC memory management.


All There Was in 1989
This excerpt from the January 1989 issue of PC Magazine touted the drive bays of an NEC computer costing USD $2595 with 640K of RAM.
References in periodicals archive ?
The DSL service level used include the 640K/ 640K designed for each ANSI/CSA loops.
To run the program, you'll need 640K of RAM on PCs and 2MB on Macs.
The full service requires an IBM-compatible computer with 640K of available RAM and a Hewlett-Packard LaserJet (Series II or Series III) or a 100% compatible printer equipped with Center Piece Accounting & Tax Fonts.
As application programs get larger, they bump up against the 640K memory limitation of DOS.
Capability: Expand is a library of Fortran subroutines that provide access to larger data files than MSDOS's 640K memory limit allows.
The 1720 is a 16 MHz unit with a 2400-baud modem, 20 MB hard drive and 640K memory expandable to 5 MB.