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The VAX 4000 is a discontinued family of low-end superminicomputers developed and manufactured by Digital Equipment Corporation (later Compaq) using microprocessors implementing the VAX instruction set architecture (ISA). The VAX 4000 succeeded the MicroVAX family, and shipped with the OpenVMS operating system. It was the last family of low-end VAX systems, as the platform was discontinued by Compaq.

VAX 4000 Model 300

A VAX 4000-300 (on the left) and an R400X expansion chassis.

The VAX 4000 Model 300, code-named "Pele", was introduced on 9 July 1990 at DECworld in Boston, Massachusetts, replacing the MicroVAX 3800 and 3900.^[1]^[2] It used the time-sharing KA670-AA CPU module containing a 35.71 MHz (28 ns cycle time) Rigel chip set with a 128 KB external secondary cache protected by ECC built from 84 ns SRAM. It supported one to four MS670-BA (32 MB) or MS670-CA (64 MB) memory modules for 32 to 256 MB of memory. Q-bus was used for expansion. The Model 300 could be upgraded to a Model 400, Model 500 or Model 600 by replacing the backplane, CPU and memory module(s).

VAX 4000 Model 200

VAX 4000 Model 200, code-named "Spitfire", was introduced in January 1991 as replacement for the MicroVAX 3400. It was positioned beneath the VAX 4000 Model 300.^[3] It used the KA660 CPU module containing a 28.57 MHz (35 ns cycle time) SOC microprocessor. It supported 16 to 64 MB of memory.

VAX 4000 Model 500

The VAX 4000 Model 500, code-named "Omega/N", was introduced on 30 October 1991, with availability in December 1991. It succeeded the VAX 4000 Model 300, but the older system remained available as a lower cost alternative.^[4] It used the KA680 CPU module containing a 71.43 MHz (14 ns cycle time) NVAX microprocessor with 128 KB of external tertiary cache.

VAX 4000 Model 100

The VAX 4000 Model 100, code-named "Cheetah-Q", is an entry-level VAX 4000 system introduced on 7 July 1992.^[5] It used the KA52 CPU module containing a 72 MHz (14 ns cycle time) NVAX microprocessor with 128 KB of external tertiary cache. It supported up to 128 MB of memory.

VAX 4000 Model 400

The VAX 4000 Model 400, code-named "Slow-mega", was a distributed server, positioned as a mid-range VAX 4000 system, introduced on 7 July 1992.^[5] It used the KA675 CPU module containing a 63 MHz (16 ns) NVAX microprocessor with microcode patch changes to slow it down beyond the cycle scaling, with 128 KB of external tertiary cache. It supported 16 to 512 MB of memory.

VAX 4000 Model 600

The VAX 4000 Model 600, code-named "Omega/N+", was a distributed server, positioned as a high-end VAX 4000 system, introduced on 7 July 1992.^[5] It used the KA690 CPU module containing an 83 MHz (12 ns) NVAX microprocessor with and 512 KB of external tertiary cache.

VAX 4000 Model 100A

The VAX 4000 Model 100A, code-named "Cheetah-Q", was introduced on 12 October 1993. It used the KA52 CPU module containing a 72 MHz (14 ns cycle time) NVAX microprocessor with 128 KB of external tertiary cache. It supported up to 128 MB of memory.

VAX 4000 Model 500A

The VAX 4000 Model 500A, code-named "Omega/N", was introduced on 12 October 1993. It used the KA681 CPU module containing a 71.43 MHz (14 ns cycle time) NVAX microprocessor with 128 KB of external tertiary cache.

VAX 4000 Model 600A

The VAX 4000 Model 600A, code-named "Omega/N+", was introduced on 12 October 1993. It used the KA691 CPU module containing an 83 MHz (12 ns cycle time) NVAX microprocessor with 512 KB of external tertiary cache.

VAX 4000 Model 700A

The VAX 4000 Model 700A, code-named "Legacy", was introduced on 12 October 1993. It used the KA692 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 2 MB of external tertiary cache.

VAX 4000 Model 105A

The VAX 4000 Model 105, code named "Cheetah-Q+", was introduced on 12 April 1994.^[6] It used the KA53 CPU module containing an 83 MHz (12 ns cycle time) NVAX microprocessor with 128 KB of external tertiary cache. It supported up to 128 MB of memory.

VAX 4000 Model 505A

The VAX 4000 Model 505A, code-named "Omega/N+", was introduced in late August 1994.^[7] It used an 83 MHz (12 ns) NVAX microprocessor with 512 KB of external tertiary cache.

VAX 4000 Model 705A

The VAX 4000 Model 705A, code-named "Legacy+", was introduced in late August 1994.^[7] It used the KA694 CPU module containing a 111.12 MHz (9 ns cycle time) NVAX microprocessor with 2 MB of external tertiary cache.

VAX 4000 Model 106A

The VAX 4000 Model 106A, code-named "Cheetah-Q++", used the KA54 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 512 KB of external tertiary cache. It was replaced by the VAX 4000 Model 108.

VAX 4000 Model 108

The VAX 4000 Model 108, code-named "Cheetah-Q++", was introduced on 8 October 1996 to replace the VAX 4000 Model 106A.^[8] It was discontinued on 30 September 2000, with the last systems shipped on 31 December 2000.^[9] It used the KA57 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 512 KB of external tertiary cache. It supported up to 256 Mb of memory with SIMMs using an industry standard form factor, double that of the previous model. The change from a proprietary SIMM to an industry standard SIMM was to lower costs, which also included reducing the size of the enclosure and more provisions for disks.

VAX 4000 Model 50

The VAX 4000 Model 50, code-named "VAXbrick", was an upgrade for MicroVAX 3x00 or VAX 4000 Model 200. It used the KA600 CPU module containing a NVAX microprocessor.

Notes

^ Markoff, John (16 July 1990). "Digital Finally Follows a Trend". The New York Times.
^ "DEC packs VAX 4000 with support RISCs to outdo IBM AS/400". Computer Business Review. 1990-07-09.
^ "DEC ADDS BABY VAX 4000 MODEL 200, SUPPORTS DSSI DISKS ON VAX 6000".
^ "DEC STRESSES APPLICATIONS PORTABILITY, BETTER PRICE-PERFORMANCE THAN RISC WITH NEW VAXES".
^ ^a ^b ^c "Digital Equipment Corp launches new VMS Release as OpenVMS, unleashes 13 PreAlpha Vaxes". Computer Business Review. 1992-07-07.
^ "DEC ANNOUNCEMENTS"
^ ^a ^b "DEC rushes to rescue of VAX users with four new models". Computer Business Review. 23 August 1994.
^ "DEC upgrades low-end VAXes to see it through the decade". Computer Business Review. 9 October 1996.
^ Lipcon, Jesse (16 August 2000). "A letter from Jesse Lipcon". Vax Systems. Compaq Computer Corporation. Archived from the original on 2000-08-15.

External links

"dec/vax/4000 PDF directory". BitSavers.org.

[1] Markoff, John (16 July 1990). "Digital Finally Follows a Trend". The New York Times.

[CBR-1990-07-10-2] "DEC packs VAX 4000 with support RISCs to outdo IBM AS/400". Computer Business Review. 1990-07-09.

[3] "DEC ADDS BABY VAX 4000 MODEL 200, SUPPORTS DSSI DISKS ON VAX 6000".

[4] "DEC STRESSES APPLICATIONS PORTABILITY, BETTER PRICE-PERFORMANCE THAN RISC WITH NEW VAXES".

[CBR-1992-07-08-5] "Digital Equipment Corp launches new VMS Release as OpenVMS, unleashes 13 PreAlpha Vaxes". Computer Business Review. 1992-07-07.

[6] "DEC ANNOUNCEMENTS"

[CBR-1994-08-23-7] "DEC rushes to rescue of VAX users with four new models". Computer Business Review. 23 August 1994.

[8] "DEC upgrades low-end VAXes to see it through the decade". Computer Business Review. 9 October 1996.

[9] Lipcon, Jesse (16 August 2000). "A letter from Jesse Lipcon". Vax Systems. Compaq Computer Corporation. Archived from the original on 2000-08-15.

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[2]

[3]

[4]

[5]

[6]

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@@ Line 1: / Line 1: @@
+{{Short description|Family of low-end superminicomputers}}
-The '''VAX 4000''' is a family of low-end [[minicomputers]] developed and manufactured by [[Digital Equipment Corporation]] (DEC) using microprocessors implementing the [[VAX]] [[instruction set architecture]] (ISA). The VAX 4000 succeeded the [[MicroVAX]] family. It was the last family of low-end systems as the VAX platform was discontinued by Compaq.
+The '''VAX 4000''' is a discontinued family of low-end [[superminicomputer]]s developed and manufactured by [[Digital Equipment Corporation]] (later [[Compaq]]) using microprocessors implementing the [[VAX]] [[instruction set architecture]] (ISA). The VAX 4000 succeeded the [[MicroVAX]] family, and shipped with the [[OpenVMS]] [[operating system]]. It was the last family of low-end VAX systems, as the platform was discontinued by Compaq.
-== VAX 4000 Model 50 ==
+== VAX 4000 Model 300 ==
+[[File:VAX 4000-300 en R400X.jpg|thumb|A VAX 4000-300 (on the left) and an R400X expansion chassis. ]]
+The VAX 4000 Model 300, code-named "''Pele''", was introduced on 9 July 1990 at DECworld in Boston, Massachusetts, replacing the MicroVAX 3800 and 3900.<ref>{{cite news |author-link=John Markoff |first=John |last=Markoff |title=Digital Finally Follows a Trend |newspaper=[[The New York Times]] |date=16 July 1990 |url=https://query.nytimes.com/gst/fullpage.html?res=9C0CE7DF1131F935A25754C0A966958260 }}</ref><ref name="CBR-1990-07-10">{{cite news |title=DEC packs VAX 4000 with support RISCs to outdo IBM AS/400 |newspaper=Computer Business Review |date=1990-07-09 <!-- |url=https://www.cbronline.com/news/dec_packs_vax_4000_with_support_riscs_to_outdo_ibm_as400/ -->}}</ref> It used the time-sharing KA670-AA CPU module containing a 35.71&nbsp;MHz (28 ns cycle time) [[Rigel (microprocessor)|Rigel]] chip set with a 128&nbsp;KB external secondary cache protected by ECC built from 84 ns SRAM. It supported one to four MS670-BA (32&nbsp;MB) or MS670-CA (64&nbsp;MB) memory modules for 32 to 256&nbsp;MB of memory. [[Q-bus]] was used for expansion. The Model 300 could be upgraded to a Model 400, Model 500 or Model 600 by replacing the backplane, CPU and memory module(s).
+== VAX 4000 Model 200 ==
-The VAX 4000 Model 50, code-named "''VAXbrick''", was an upgrade for [[MicroVAX|MicroVAX 3x00]] or VAX 4000 Model 200. It used the KA600 CPU module containing a [[NVAX]] microprocessor.
+VAX 4000 Model 200, code-named "''Spitfire''", was introduced in January 1991 as replacement for the [[MicroVAX#MicoVAX 3400|MicroVAX 3400]]. It was positioned beneath the VAX 4000 Model 300.<ref>"DEC ADDS BABY VAX 4000 MODEL 200, SUPPORTS DSSI DISKS ON VAX 6000".</ref> It used the KA660 CPU module containing a 28.57&nbsp;MHz (35 ns cycle time) [[CVAX#SOC|SOC]] microprocessor. It supported 16 to 64&nbsp;MB of memory.
-== VAX 4000 Model 100 ==
+== VAX 4000 Model 500 ==
-The VAX 4000 Model 100, code-named "''Cheetah-Q''", used the KA52 CPU module containing a 72 MHz (14 ns cycle time) NVAX microprocessor, 8 KB on-die primary cache and 128 KB external secondary cache. It supported up to 128 MB of memory.
+The VAX 4000 Model 500, code-named "''Omega/N''", was introduced on 30 October 1991, with availability in December 1991. It succeeded the VAX 4000 Model 300, but the older system remained available as a lower cost alternative.<ref>"DEC STRESSES APPLICATIONS PORTABILITY, BETTER PRICE-PERFORMANCE THAN RISC WITH NEW VAXES".</ref> It used the KA680 CPU module containing a 71.43&nbsp;MHz (14 ns cycle time) [[NVAX]] microprocessor with 128&nbsp;KB of external tertiary cache.
-== VAX 4000 Model 100A ==
+== VAX 4000 Model 100 ==
-The VAX 4000 Model 100A, code-named "''Cheetah-Q''", used the KA52 CPU module containing a 72 MHz (14 ns cycle time) NVAX microprocessor, 10 KB of on-die primary cache and 128 KB external secondary cache. It supported up to 128 MB of memory.
+The VAX 4000 Model 100, code-named "''Cheetah-Q''", is an entry-level VAX 4000 system introduced on 7 July 1992.<ref name="CBR-1992-07-08">{{cite news |title=Digital Equipment Corp launches new VMS Release as OpenVMS, unleashes 13 PreAlpha Vaxes |newspaper=Computer Business Review |date=1992-07-07 <!-- |url=https://www.cbronline.com/news/digital_equipment_corp_launches_new_vms_release_as_openvms_unleashes_13_prealpha_vaxes/ -->}}</ref> It used the KA52 CPU module containing a 72&nbsp;MHz (14 ns cycle time) NVAX microprocessor with 128&nbsp;KB of external tertiary cache. It supported up to 128&nbsp;MB of memory.
-== VAX 4000 Model 105A ==
+== VAX 4000 Model 400 ==
-The VAX 4000 Model 105, code named "''Cheetah-Q+''", used the KA53 CPU module containing an 83 MHz (12 ns cycle time) NVAX microprocessor with 10 KB of on-die primary cache and 128 KB external secondary cache. It supported up to 128 MB of memory.
+The VAX 4000 Model 400, code-named "Slow-''mega''", was a distributed server, positioned as a mid-range VAX 4000 system, introduced on 7 July 1992.<ref name="CBR-1992-07-08"/> It used the KA675 CPU module containing a 63&nbsp;MHz (16 ns) NVAX microprocessor with [[microcode]] patch changes to slow it down beyond the cycle scaling, with 128&nbsp;KB of external tertiary cache. It supported 16 to 512&nbsp;MB of memory.
-== VAX 4000 Model 106A ==
+== VAX 4000 Model 600 ==
-The VAX 4000 Model 106A, code-named "''Cheetah-Q++''", used the KA54 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 10 KB of on-die primary cache and 512 KB external secondary cache. It was replaced by the VAX 4000 Model 108.
+The VAX 4000 Model 600, code-named "''Omega/N+''", was a distributed server, positioned as a high-end VAX 4000 system, introduced on 7 July 1992.<ref name="CBR-1992-07-08"/> It used the KA690 CPU module containing an 83&nbsp;MHz (12 ns) NVAX microprocessor with and 512&nbsp;KB of external tertiary cache.
-== VAX 4000 Model 108 ==
+== VAX 4000 Model 100A ==
-The VAX 4000 Model 108, code-named "''Cheetah-Q++''", was introduced on 8 October 1996 to replace the VAX 4000 Model 106A.<ref>"DEC UPGRADES LOW-END VAXES TO SEE IT THROUGH THE DECADE".</ref> It was discontinued on 30 September 2000, with the last systems shipped on 31 December 2000.<ref>Lipcon ''A letter from Jesse Lipcon''.</ref> It used the KA57 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 10 KB of on-die primary cache and 512 KB external secondary cache. It supported up to 256 Mb of memory with SIMMs using an industry standard form factor, double that of the previous model. The change from a proprietary SIMM to an industry standard SIMM was to lower costs, which also included reducing the size of the enclosure and more provisions for disks.
+The VAX 4000 Model 100A, code-named "''Cheetah-Q''", was introduced on 12 October 1993. It used the KA52 CPU module containing a 72&nbsp;MHz (14 ns cycle time) NVAX microprocessor with 128&nbsp;KB of external tertiary cache. It supported up to 128&nbsp;MB of memory.
-== VAX 4000 Model 200 ==
+== VAX 4000 Model 500A ==
-VAX 4000 Model 200, code-named "''Spitfire''", uses the KA660 CPU module containing a 28.57 MHz (35 ns cycle time) [[CVAX#SOC|SOC]] microprocessor. It supported 16 to 64 MB of memory.
-<!-- VAX 4000 Model 215 -->
-== VAX 4000 Model 300 ==
-The VAX 4000 Model 300, code-named "''Pele''", was introduced on 9 July 1990 at DECworld in Boston, Massachusetts, replacing the MicroVAX 3800 and 3900.<ref>Markoff "Digital Finally Follows a Trend"</ref><ref name="CBR-1990-07-10">"DEC PACKS VAX 4000 WITH SUPPORT RISCS TO OUTDO IBM AS/400"</ref> It used the KA670 CPU module containing a 35.71 MHz (28 ns cycle time) [[Rigel (microprocessor)|Rigel]] chip set with 128 KB of external secondary cache protected by ECC. It supported 32 to 128 MB of memory. [[Q-bus]] was used for expansion.
+The VAX 4000 Model 500A, code-named "''Omega/N''", was introduced on 12 October 1993. It used the KA681 CPU module containing a 71.43&nbsp;MHz (14 ns cycle time) NVAX microprocessor with 128&nbsp;KB of external tertiary cache.
-== VAX 4000 Model 400 ==
+== VAX 4000 Model 600A ==
-The VAX 4000 Model 400, code-named "''Omega''", used the KA675 CPU module containing a 63 MHz (16 ns) NVAX microprocessor with 8 KB of on-die primary cache, 128 KB of external secondary cache. It supported 16 to 512 MB of memory.
+The VAX 4000 Model 600A, code-named "''Omega/N+''", was introduced on 12 October 1993. It used the KA691 CPU module containing an 83&nbsp;MHz (12 ns cycle time) NVAX microprocessor with 512&nbsp;KB of external tertiary cache.
-<!-- VAX 4000 Model 430 -->
-== VAX 4000 Model 500 ==
+== VAX 4000 Model 700A ==
-The VAX 4000 Model 500, code-named "''Omega/N''", used the KA680 CPU module containing a 71.43 MHz (14 ns cycel time) NVAX microprocessor with 10 KB on-die primary cache and 128 KB external secondary cache.
+The VAX 4000 Model 700A, code-named "''Legacy''", was introduced on 12 October 1993. It used the KA692 CPU module containing a 100&nbsp;MHz (10 ns cycle time) NVAX microprocessor with 2&nbsp;MB of external tertiary cache.
-== VAX 4000 Model 500A ==
+== VAX 4000 Model 105A ==
-The VAX 4000 Model 500A, code-named "''Omega/N''", used the KA681 CPU module containing a 71.43 MHz (14 ns cycle time) NVAX microprocessor with 10 KB of on-die primary cache and 128 KB of external secondary cache.
+The VAX 4000 Model 105, code named "''Cheetah-Q+''", was introduced on 12 April 1994.<ref>"DEC ANNOUNCEMENTS"</ref> It used the KA53 CPU module containing an 83&nbsp;MHz (12 ns cycle time) NVAX microprocessor with 128&nbsp;KB of external tertiary cache. It supported up to 128&nbsp;MB of memory.
 == VAX 4000 Model 505A ==
-The VAX 4000 Model 505A, code-named "''Omega/N+''", used an 83 MHz (12 ns) NVAX microprocessor with 10 KB of on-die primary cache and 512 KB external of external secondary cache.
+The VAX 4000 Model 505A, code-named "''Omega/N+''", was introduced in late August 1994.<ref name="CBR-1994-08-23">{{cite news |title=DEC rushes to rescue of VAX users with four new models |newspaper=Computer Business Review  |date=23 August 1994 <!-- |url=https://www.cbronline.com/news/dec_rushes_to_rescue_of_vax_users_with_four_new_models/ --> }}</ref> It used an 83&nbsp;MHz (12 ns) NVAX microprocessor with 512&nbsp;KB of external tertiary cache.
-== VAX 4000 Model 600 ==
+== VAX 4000 Model 705A ==
-The VAX 4000 Model 600, code-named "''Omega/N+''", used the KA690 CPU module containing an 83MHz (12 ns) NVAX microprocessor with 10 KB of on-die primary cache and 512 KB of external secondary cache.
+The VAX 4000 Model 705A, code-named "''Legacy+''", was introduced in late August 1994.<ref name="CBR-1994-08-23"/> It used the KA694 CPU module containing a 111.12&nbsp;MHz (9 ns cycle time) NVAX microprocessor with 2&nbsp;MB of external tertiary cache.
-== VAX 4000 Model 600A ==
+== VAX 4000 Model 106A ==
-The VAX 4000 Model 600A, code-named "''Omega/N+''", used the KA691 CPU module containing an 83 MHz (12 ns cycle time) NVAX microprocessor with 10 KB of on-die primary cache and 512 KB of external secondary cache.
+The VAX 4000 Model 106A, code-named "''Cheetah-Q++''", used the KA54 CPU module containing a 100&nbsp;MHz (10 ns cycle time) NVAX microprocessor with 512&nbsp;KB of external tertiary cache. It was replaced by the VAX 4000 Model 108.
-== VAX 4000 Model 700A ==
+== VAX 4000 Model 108 ==
+The VAX 4000 Model 108, code-named "''Cheetah-Q++''", was introduced on 8 October 1996 to replace the VAX 4000 Model 106A.<ref>{{cite news |title=DEC upgrades low-end VAXes to see it through the decade |newspaper=Computer Business Review  |date=9 October 1996 <!-- |url=https://www.cbronline.com/news/dec_upgrades_low_end_vaxes_to_see_it_through_the_decade/ --> }}</ref> It was discontinued on 30 September 2000, with the last systems shipped on 31 December 2000.<ref>{{cite web |last=Lipcon |first=Jesse |url=http://www.compaq.com/alphaserver/vax/vax_letter_final.html |title=A letter from Jesse Lipcon |work=Vax Systems |publisher=Compaq Computer Corporation |date=16 August 2000|archive-url=https://web.archive.org/web/20000815201016/http://www.compaq.com/alphaserver/vax/vax_letter_final.html |archive-date=2000-08-15 }}</ref> It used the KA57 CPU module containing a 100&nbsp;MHz (10 ns cycle time) NVAX microprocessor with 512&nbsp;KB of external tertiary cache. It supported up to 256&nbsp;Mb of memory with SIMMs using an industry standard form factor, double that of the previous model. The change from a proprietary SIMM to an industry standard SIMM was to lower costs, which also included reducing the size of the enclosure and more provisions for disks.
-The VAX 4000 Model 700A, code-named "''Legacy''", used the KA692 CPU module containing a 100 MHz (10 ns cycle time) NVAX microprocessor with 10 KB of on-die primary cache and 2 MB of external secondary cache.
-== VAX 4000 Model 705A ==
+== VAX 4000 Model 50 ==
-The VAX 4000 Model 705A, code-named "''Legacy+''", used the KA694 CPU module containing a 111.12 MHz (9 ns cycle time) NVAX microprocessor with 10 KB of on-die primary cache and 2 MB of external secondary cache.
+The VAX 4000 Model 50, code-named "''VAXbrick''", was an upgrade for [[MicroVAX|MicroVAX 3x00]] or VAX 4000 Model 200. It used the KA600 CPU module containing a [[NVAX]] microprocessor. <!-- VAX 4000 Model 215 and VAX 4000 Model 430 related? -->
 == Notes ==
@@ Line 69: / Line 70: @@
 {{Reflist}}
-== References ==
+== External links ==
+* {{cite web |title=dec/vax/4000 PDF directory |publisher=BitSavers.org |url=https://www.mirrorservice.org/sites/www.bitsavers.org/pdf/dec/vax/4000/}}
-* Lipcon, Jesse. [http://web.archive.org/web/20000815201016/http://www.compaq.com/alphaserver/vax/vax_letter_final.html ''A letter from Jesse Lipcon''].
-* [[John Markoff|Markoff, John]] (16 July 1990). [http://query.nytimes.com/gst/fullpage.html?res=9C0CE7DF1131F935A25754C0A966958260 "Digital Finally Follows a Trend"]. ''[[The New York Times]]''.
-* [http://www.cbronline.com/news/dec_packs_vax_4000_with_support_riscs_to_outdo_ibm_as400 "DEC PACKS VAX 4000 WITH SUPPORT RISCS TO OUTDO IBM AS/400"]. (10 July 1990). ''Computer Business Review''.
-* [http://www.cbronline.com/news/dec_upgrades_low_end_vaxes_to_see_it_through_the_decade "DEC UPGRADES LOW-END VAXES TO SEE IT THROUGH THE DECADE"]. (9 October 1996). ''Computer Business Review''.
-{{Template:DEC hardware}}
-{{Compu-hardware-stub}}
+{{DEC hardware}}
+{{DEFAULTSORT:Vax 4000}}
-[[Category:DEC hardware]]
+[[Category:DEC minicomputers]]
+[[Category:Computer-related introductions in 1990]]