This is the third public release of NetBSD for the DECstation and DECsystem family of computers. This release includes support for either mips1 (r2000, r3000) and mips3 (r4000, r4400, r4600) CPUs. mips1 and mips3 support can be configured into a single kernel. NetBSD 1.3 can be installed onto DECstation 5000/50, 5000/150, 5000/260, or 5900 models, as well as all previously-supported hardware. Though stable NetBSD/pmax snapshots with shared-library support have been available for over a year, this is the first full NetBSD/pmax release to ship with ELF shared libraries. Much of the user-space support for this is due to work by Per Fogelstrom (pefo@OpenBSD.ORG) and ported to NetBSD by Manuel Bouyer. Ultrix emulation for Internet applications is improved over NetBSD 1.2. The Ultrix `ifconfig' command and multicast applications now work in Ultrix compatibility mode. A ecoff-format NetBSD kernel in an Ultrix root filesysstem should boot multi-user, though this is not recommended as an installation method. A bug in mips interrupt handling from 4.4BSD, which could cause `remrunque' panics under heavy load in both NetBSD prior to 1.2E and OpenBSD, is fixed in this release. There are yet more enhancements for the 4.4bsd-Lite/pmax SCSI drivers, which now correctly probes newer, faster, SCSI-2 disks, and handles large transfers (up to 64K) on 3100s. Intermediate copies of disk I/O on IOASIC-based machines are eliminated, yielding a modest improvement on old disks like the rz25, and a bigger improvement on faster disks. Kernel performance tuning includes lower system call overhead, a faster bcopy() routine, faster IP checksumming code, and other imrprovemnts. These combine to show a dramatic (e.g., 1.5x-2.5x) improvement on microbenchmarks like the lmbench suite, and a modest improvement on larger benchmarks like kernel builds.