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Legacy systems

 Table of contents 222

1. Backward compatibility

 split articles: 9

1.1. Backward-compatible video game consoles

1.2. Binary-code compatibility

1.3. Bug compatibility

1.4. Deprecation

1.5. Forward compatibility

1.6. List of Xbox games compatible with Xbox 360

1.7. List of backward-compatible games for Xbox One and Series X/S

1.8. ProgID

1.9. Source-code compatibility
  split
  Backward compatibility toc wiki

2. IPv4

 split articles: 6

2.1. Address plus Port

2.2. Carrier-grade NAT

2.3. IPv4 address exhaustion

2.4. Internet Protocol version 4

2.5. List of assigned /8 IPv4 address blocks

2.6. List of countries by IPv4 address allocation

3. Legacy hardware

 split articles: 27

3.1. Floppy disk computer storage

3.2. AMX Mouse

3.3. Atari joystick port

3.4. BBC Micro expansion unit

3.5. Bus mouse

3.6. Chinese language card

3.7. Commodore bus

3.8. Floppy disk

3.9. Floppy disk hardware emulator

3.10. Floppy disk variants

3.11. Game port

3.12. Hardcard

3.13. IEEE 1284

3.14. Industry Standard Architecture

3.15. Legacy-free PC

3.16. Legacy port

3.17. List of floppy disk formats

3.18. LocalTalk

3.19. Magneto-optical drive

3.20. Model F keyboard

3.21. Monochrome monitor

3.22. PC speaker

3.23. Parallel port

3.24. Serial port

3.25. USB-to-serial adapter

3.26. Write precompensation

3.27. X10 accelerated floppy drive

4. Minicomputers

 split articles: 69

4.1. DEC minicomputers

4.2. IBM minicomputers

4.3. Minicomputer stubs

4.4. Norsk Data minicomputers

4.5. Unix software

4.6. 3B series computers

4.7. AN/GYK-12

4.8. Alpha Microsystems

4.9. BB Tecnologia e Serviços

4.10. BCL Molecular

4.11. Bendix G-15

4.12. CDC 1700

4.13. CID-201

4.14. Computer Control Company

4.15. Computer Technology Limited

4.16. DDP-24

4.17. Data General Eclipse

4.18. Data General Eclipse MV/8000

4.19. Data General Nova

4.20. Digico Limited

4.21. Elxsi

4.22. Flip-Chip module

4.23. GEC 2050

4.24. GEC 4000 series

4.25. GEC Series 63

4.26. General Automation

4.27. HLH Orion

4.28. HP 2100

4.29. HP 3000

4.30. Honeywell 316

4.31. Honeywell Level 6

4.32. Honeywell System 700

4.33. IBM 801

4.34. IMLAC

4.35. Interdata

4.36. Interdata 7/32 and 8/32

4.37. K-202

4.38. Lockheed MAC-16

4.39. MERA 300

4.40. Minicomputer

4.41. Multum

4.42. ND812

4.43. Nicolet 1080

4.44. Norsk Data

4.45. P4000

4.46. PC12 minicomputer

4.47. Patinho Feio

4.48. PowerHouse (programming language)

4.49. Powernode 9080

4.50. Prime Computer

4.51. Programmed Data Processor

4.52. Q-Bus

4.53. RCA 1600

4.54. Raytheon 704

4.55. Robotron K 1820

4.56. Robotron K 1840

4.57. Selenia Gp-16

4.58. Simulation for Automatic Machinery

4.59. Singer System Ten

4.60. Superminicomputer

4.61. TI-990

4.62. Tandem Computers

4.63. VAX

4.64. Wang 2200

4.65. Wang 3300

4.66. Wang 4000

4.67. Wang Laboratories

4.68. Xerox 500 series

4.69. Xylogics

5. Software maintenance

 split articles: 33

5.1. Authorized Program Analysis Report

5.2. Backporting

5.3. Debug code

5.4. Delta update

5.5. Hotfix

5.6. Journal of Software: Evolution and Process

5.7. Lehman's laws of software evolution

5.8. Long-term support

5.9. Maintenance mode

5.10. Microsoft Software Assurance

5.11. OpenFrame

5.12. Patch (computing)

5.13. Program slicing

5.14. Program temporary fix

5.15. SMP/E

5.16. SQALE

5.17. Schema migration

5.18. Software analytics

5.19. Software archaeology

5.20. Software brittleness

5.21. Software entropy

5.22. Software evolution

5.23. Software maintainer

5.24. Software modernization

5.25. Software rot

5.26. Software visualization

5.27. Source port

5.28. SrcML

5.29. Stovepipe system

5.30. System migration

5.31. Technical debt

5.32. Unofficial patch

5.33. Workaround

6. Acorn Online Media Set Top Box

7. CHILL

8. Cab Secure Radio

9. Characterization test

10. Indexed file

11. Individual Master File

12. Legacy costs

13. Legacy mode

14. Legacy system

15. ORCATS

16. OS/2

 split articles: 20

16.1. OS/2 commands

16.2. OS/2 drivers

16.3. OS/2 files

16.4. OS/2 people

16.5. OS/2 software

16.6. OS/2 technology

16.7. ArcaOS

16.8. EComStation

16.9. E (PC DOS)

16.10. Graphical Data Display Manager

16.11. IBM LAN Server

16.12. IBM PS/2

16.13. Information Presentation Facility

16.14. Installable File System

16.15. LAN Manager

16.16. Presentation Manager

16.17. Team OS/2

16.18. Windows Libraries for OS/2

16.19. Workplace OS

16.20. Workplace Shell

17. Pick operating system

18. SabreTalk

19. Shadow (OS/2)

20. Standalone program

21. TOPS

22. Teletex

23. Teletext

 split articles: 35

23.1. Antiope (teletext)

23.2. Austext

23.3. Bamboozle!

23.4. Ceefax

23.5. Digitiser

23.6. Electra (teletext)

23.7. ExtraVision

23.8. Infonet

23.9. JTES

23.10. List of teletext services

23.11. MediaCorp Teletext

23.12. Mullard SAA5050

23.13. NABTS

23.14. NBC Teletext

23.15. NexTView

23.16. ORACLE (teletext)

23.17. Park Avenue (teletext soap)

23.18. Planet Sound

23.19. Programme Delivery Control

23.20. RTÉ Aertel

23.21. SWISS TXT

23.22. Same language subtitling

23.23. Sbectel

23.24. Sky Text

23.25. Sports Plus Network

23.26. Subtitles

23.27. TVNZ Teletext

23.28. Teletext Holidays

23.29. Teletext Ltd.

23.30. Teletext character set

23.31. Televideo (teletext)

23.32. Timeline of in vision teletext broadcasts in the UK

23.33. Timeline of teletext in the UK

23.34. Téacs TG4

23.35. World System Teletext

 Ancestors