Traveling Software Inc, Bothell, Washington developer of LAP-LINK high-speed serial transfer package, has introduced LAP-LINK Mac, which copies data files between Apple Macintosh and MS-DOS micros: LAP-LINK Mac is described as a fast and inexpensive data transfer package for those with both Macs and MS-DOS micros and laptops; it runs at 57.6Kbps on ordinary serial ports and a six foot universal cable included in the package links any version of the Macintosh with any MS-DOS box, including PS/2; on 5.25 and 3.5 disks, it is $140.