| OS | Procesador | Versión | Enviado | Reseñas |
|---|---|---|---|---|
| AIX 4.3.2 | RS6000 | v6.5 | 1999-05-26 | (Andreas Zeugswetter) |
| BSDI | x86 | v6.5 | 1999-05-25 | (Bruce Momjian |
| FreeBSD 2.2.x-4.0 | x86 | v6.5 | 1999-05-25 | (Tatsuo Ishii, Marc Fournier) |
| DGUX 5.4R4.11 | m88k | v6.3 | 1998-03-01 | v6.4 probablemente correcto. Necesita nuevo mantenedor. (Brian E Gallew) |
| Digital Unix 4.0 | Alpha | v6.5.3 | 1999-11-04 | (Pedro J. Lobo) |
| HPUX | PA-RISC | v6.4 | 1998-10-25 | ambas 9.0x y 10.20 (Tom Lane, Stan Brown) |
| IRIX 6.5 | MIPS | v6.4 | 1998-12-29 | IRIX 5.x es diferente (Mark Dalphin) |
| linux 2.0.x | Alpha | v6.5.3 | 1999-11-05 | (Ryan Kirkpatrick) |
| linux 2.2.x | arm41 | v6.5.3 | 1999-11-05 | (Mark Knox) |
| linux 2.2.x/glibc2 | x86 | v6.5.3 | 1999-11-05 | (Lamar Owens) |
| linux 2.0.x | MIPS | v6.4 | 1998-12-16 | Cobalt Qube (Tatsuo Ishii) |
| linux 2.0.x | Sparc | v6.4 | 1998-10-25 | (Tom Szybist) |
| linuxPPC 2.1.24 | PPC603e | v6.4 | 1998-10-26 | Powerbook 2400c (Tatsuo Ishii) |
| mklinux DR3 | PPC750 | v6.4 | 1998-09-16 | PowerMac 7600 (Tatsuo Ishii) |
| NetBSD | arm32 | v6.5 | 1999-04-14 | (Andrew McMurry) |
| NetBSD 1.3.2 | x86 | v6.4 | 1998-10-25 | (Brook Milligan) |
| NetBSD | m68k | v6.4.2 | 1998-12-28 | Mac SE/30 (Mr. Mutsuki Nakajima, Tatsuo Ishii) |
| NetBSD-current | NS32532 | v6.4 | 1998-10-27 | pequeños problemas en cálculos de fecha/tiempo (Jon Buller) |
| NetBSD/sparc 1.3H | Sparc | v6.4 | 1998-10-27 | (Tom I Helbekkmo) |
| NetBSD 1.3 | VAX | v6.3 | 1998-03-01 | (Tom I Helbekkmo) |
| SCO OpenServer 5 | x86 | v6.5 | 1999-05-25 | (Andrew Merrill) |
| SCO UnixWare 7 | x86 | v6.5 | 1999-05-25 | (Andrew Merrill) |
| Solaris | x86 | v6.4 | 1998-10-28 | (Marc Fournier) |
| Solaris 2.6-2.7 | Sparc | v6.4 | 1998-10-28 | (Tom Szybist, Frank Ridderbusch) |
| SunOS 4.1.4 | Sparc | v6.3 | 1998-03-01 | Parches presentados (Tatsuo Ishii) |
| SVR4 | MIPS | v6.4 | 1998-10-28 | Sin soporte para compilar con 64-bit (Frank Ridderbusch) |
| Windows | x86 | v6.4 | 1999-01-06 | Librerías del lado del cliente o ODBC/JDBC. Sin servidor todavía. (Magnus Hagander |
| Windows NT | x86 | v6.5 | 1999-05-26 | Trabajando con la librería Cygwin. (Daniel Horak) |
Nota: Para Windows NT, el portado de la parte del servidor Postgres se ha conseguido recientemente. Se requiere de la librería Cygnus para compilarlo.