SlideShare ist ein Scribd-Unternehmen logo
1 von 9
Downloaden Sie, um offline zu lesen
A Brief History of Backup
                    and Storage


1775         1846      1951 1952 1956            1971   1972            1985




Punch Card            Magnetic                             Cassette
                                         Hard
                       Tape              Drive

                                                  Floppy              Computer-
         Punch Tape              Tape              Disk                Readable
                                 Drive                                 CD-ROM
PUNCH CARD
    In common use until mid-1970s,
    when replaced by magnetic tape

    Used as early as 1725 in textile
    industry for controlling mechanized
    textile looms




    Approximate Years in Use: 1725 - 1925
PUNCH TAPE
    Originally pioneered by textile
    industry for use with mechanized
    looms

    Each row on tape represented one
    character




    Approximate Years in Use: 1846 - 1990s
MAGNETIC TAPE
     First used in 1951 to record
     computer data on the Eckert-
     Mauchly UNIVAC I

     Tapes were metal and 1200 feet
     long (365 meters) and very heavy

     Long length made it prone to tears
     and breaks


     Approximate Years in Use: 1951- present
TAPE DRIVE
    Introduced in 1952 by IBM
    Used vacuum columns to buffer
    nickel-plated magnetic tape to
    prevent media from tearing
    Some tapes were 1,200 feet long
    Replaced equivalent of 12,500
    punch cards
    Capacity of 2 million digits per tape

    Approximate Years in Use: 1951- present
HARD DRIVE
    First hard disk drive, IBM Model 350
    Disk File, shipped in 1956 with IBM
    305 RAMAC computer.

    Computer itself was 30’ by 50” (9m
    x 15m); storage device itself—the
    first commercial hard disk drive–
    was a 1.5-meter cube.




    Approximate Years in Use: 1956- present
FLOPPY DISK
          First floppy disk released by IBM in
          1971. Read-only, 8″ in diameter,
          stored 80 kB
          Intended as portable, more reliable
          medium vs punched cards, magnetic
          tape
          8” disks too large for new
          microcomputers of 1970s, so 5¼”
          disk created; 3½” floppy followed

  Approximate Years in Use: 1971- 1982 (8” & 5 ¼”)
                            1982-2009 (3 ½”)
CASSETTE
      Introduced for audio use by Philips
      in Europe in 1963
      Introduced in 1972 as storage
      medium for PCs
      Standard 90-minute cassette stored
      700KB of data per side
      Used on ZX Spectrum, TRS-80,
      Commodore 64, and others


  Approximate Years in Use: 1972 to late 1980s
COMPUTER-READABLE
     CD-ROM
       Optical disc invented in 1958; first
       commercial product, Laserdisk,
       introduced in 1978
       First audio compact disc introduced
       in 1982; eventually obsoleted
       magnetic tape
       Computer-readable data-storing CD-
       ROMs introduced in 1985.
       By late ’90s, CD-ROM disks and
       drives had obsoleted floppies

       Approximate Years in Use: 1985- present

Weitere ähnliche Inhalte

Was ist angesagt?

Audio and Video streaming.ppt
Audio and Video streaming.pptAudio and Video streaming.ppt
Audio and Video streaming.pptVideoguy
 
CÁLCULO DE SUB-REDES DE FORMA PRÁTICA
CÁLCULO DE SUB-REDES DE FORMA PRÁTICACÁLCULO DE SUB-REDES DE FORMA PRÁTICA
CÁLCULO DE SUB-REDES DE FORMA PRÁTICAAugusto Cezar Pinheiro
 
GREEN CLOUD COMPUTING-A Data Center Approach
GREEN CLOUD COMPUTING-A Data Center ApproachGREEN CLOUD COMPUTING-A Data Center Approach
GREEN CLOUD COMPUTING-A Data Center ApproachDr Sukhpal Singh Gill
 
Pros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen Storage
Pros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen StoragePros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen Storage
Pros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen StorageEric Carter
 
Sistemas operacionais raid
Sistemas operacionais   raidSistemas operacionais   raid
Sistemas operacionais raidCarlos Melo
 
Présentation du stockage RAID
Présentation du stockage RAIDPrésentation du stockage RAID
Présentation du stockage RAIDEmmanuel Florac
 
NAS - Network Attached Storage
NAS - Network Attached StorageNAS - Network Attached Storage
NAS - Network Attached StorageShashank Bhatnagar
 
Redes de Computadores 2 - Aula 3 - Roteamento
Redes de Computadores 2 - Aula 3 - RoteamentoRedes de Computadores 2 - Aula 3 - Roteamento
Redes de Computadores 2 - Aula 3 - RoteamentoCleber Fonseca
 
iSCSI (Internet Small Computer System Interface)
iSCSI (Internet Small Computer System Interface)iSCSI (Internet Small Computer System Interface)
iSCSI (Internet Small Computer System Interface)Sayali Koranne
 
Alta disponibilidad en clusteres asterisk
Alta disponibilidad en clusteres asterisk Alta disponibilidad en clusteres asterisk
Alta disponibilidad en clusteres asterisk Javier Boquin Rivera
 
Cloud computing-security-issues
Cloud computing-security-issuesCloud computing-security-issues
Cloud computing-security-issuesAleem Mohammed
 
Introdução a internet
Introdução a internet Introdução a internet
Introdução a internet filipereira
 

Was ist angesagt? (20)

SAN
SANSAN
SAN
 
Audio and Video streaming.ppt
Audio and Video streaming.pptAudio and Video streaming.ppt
Audio and Video streaming.ppt
 
CÁLCULO DE SUB-REDES DE FORMA PRÁTICA
CÁLCULO DE SUB-REDES DE FORMA PRÁTICACÁLCULO DE SUB-REDES DE FORMA PRÁTICA
CÁLCULO DE SUB-REDES DE FORMA PRÁTICA
 
GREEN CLOUD COMPUTING-A Data Center Approach
GREEN CLOUD COMPUTING-A Data Center ApproachGREEN CLOUD COMPUTING-A Data Center Approach
GREEN CLOUD COMPUTING-A Data Center Approach
 
Pros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen Storage
Pros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen StoragePros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen Storage
Pros and Cons of Erasure Coding & Replication vs. RAID in Next-Gen Storage
 
Sistemas operacionais raid
Sistemas operacionais   raidSistemas operacionais   raid
Sistemas operacionais raid
 
Présentation du stockage RAID
Présentation du stockage RAIDPrésentation du stockage RAID
Présentation du stockage RAID
 
External Memory
External  MemoryExternal  Memory
External Memory
 
Calculo de endereço ip
Calculo de endereço ipCalculo de endereço ip
Calculo de endereço ip
 
Raid
Raid Raid
Raid
 
NetApp & Storage fundamentals
NetApp & Storage fundamentalsNetApp & Storage fundamentals
NetApp & Storage fundamentals
 
Network Monitoring Tools
Network Monitoring ToolsNetwork Monitoring Tools
Network Monitoring Tools
 
NAS - Network Attached Storage
NAS - Network Attached StorageNAS - Network Attached Storage
NAS - Network Attached Storage
 
Redes de Computadores 2 - Aula 3 - Roteamento
Redes de Computadores 2 - Aula 3 - RoteamentoRedes de Computadores 2 - Aula 3 - Roteamento
Redes de Computadores 2 - Aula 3 - Roteamento
 
iSCSI (Internet Small Computer System Interface)
iSCSI (Internet Small Computer System Interface)iSCSI (Internet Small Computer System Interface)
iSCSI (Internet Small Computer System Interface)
 
Green cloud computing
Green cloud computingGreen cloud computing
Green cloud computing
 
Alta disponibilidad en clusteres asterisk
Alta disponibilidad en clusteres asterisk Alta disponibilidad en clusteres asterisk
Alta disponibilidad en clusteres asterisk
 
Cloud computing-security-issues
Cloud computing-security-issuesCloud computing-security-issues
Cloud computing-security-issues
 
Sistemas Operacionais para Servidores
Sistemas Operacionais para ServidoresSistemas Operacionais para Servidores
Sistemas Operacionais para Servidores
 
Introdução a internet
Introdução a internet Introdução a internet
Introdução a internet
 

Ähnlich wie A brief history of backup and storage

History of Computer Hardware
History of Computer HardwareHistory of Computer Hardware
History of Computer HardwareSubham Rouniyar
 
Removeable Storage
Removeable StorageRemoveable Storage
Removeable StorageJoel May
 
History of storage devices
History of storage devicesHistory of storage devices
History of storage devicesaalyamii
 
Project in media and information literacy
Project in media and information literacyProject in media and information literacy
Project in media and information literacyRexly Lasaca
 
History of Digital Media from 1990 1999
History of Digital Media from 1990 1999History of Digital Media from 1990 1999
History of Digital Media from 1990 1999Zeeshan Shah
 
Tablet computer history
Tablet computer historyTablet computer history
Tablet computer historyAnıl Bakan
 
The development of digital music
The development of digital musicThe development of digital music
The development of digital musicMartin Mendiola
 
History of record
History of recordHistory of record
History of recordmoushomi94
 
1970 to 1980 media and technologies
1970 to 1980 media and technologies1970 to 1980 media and technologies
1970 to 1980 media and technologiesRexly Lasaca
 
Like it or not, you're already in the cloud
Like it or not, you're already in the cloudLike it or not, you're already in the cloud
Like it or not, you're already in the cloudF-Secure Corporation
 
Evolution of portable audio
Evolution of portable audioEvolution of portable audio
Evolution of portable audioNate Durrett
 
Timeline of the technology and music industry
Timeline of the technology and music industryTimeline of the technology and music industry
Timeline of the technology and music industryBethandVicMedia
 
As media timeline. (1)
As media timeline. (1)As media timeline. (1)
As media timeline. (1)Joy Brett
 

Ähnlich wie A brief history of backup and storage (20)

History of Computer Hardware
History of Computer HardwareHistory of Computer Hardware
History of Computer Hardware
 
Removeable Storage
Removeable StorageRemoveable Storage
Removeable Storage
 
History of storage devices
History of storage devicesHistory of storage devices
History of storage devices
 
Project in media and information literacy
Project in media and information literacyProject in media and information literacy
Project in media and information literacy
 
History of Digital Media from 1990 1999
History of Digital Media from 1990 1999History of Digital Media from 1990 1999
History of Digital Media from 1990 1999
 
Storage devices
Storage devicesStorage devices
Storage devices
 
1148_recording sounds.ppt
1148_recording sounds.ppt1148_recording sounds.ppt
1148_recording sounds.ppt
 
1148_recording sounds.ppt
1148_recording sounds.ppt1148_recording sounds.ppt
1148_recording sounds.ppt
 
1148_recording sounds.ppt
1148_recording sounds.ppt1148_recording sounds.ppt
1148_recording sounds.ppt
 
4.1 History of record
4.1 History of record4.1 History of record
4.1 History of record
 
Tablet computer history
Tablet computer historyTablet computer history
Tablet computer history
 
The development of digital music
The development of digital musicThe development of digital music
The development of digital music
 
History of record
History of recordHistory of record
History of record
 
Information provider
Information providerInformation provider
Information provider
 
1970 to 1980 media and technologies
1970 to 1980 media and technologies1970 to 1980 media and technologies
1970 to 1980 media and technologies
 
Like it or not, you're already in the cloud
Like it or not, you're already in the cloudLike it or not, you're already in the cloud
Like it or not, you're already in the cloud
 
Evolution of portable audio
Evolution of portable audioEvolution of portable audio
Evolution of portable audio
 
ppt
pptppt
ppt
 
Timeline of the technology and music industry
Timeline of the technology and music industryTimeline of the technology and music industry
Timeline of the technology and music industry
 
As media timeline. (1)
As media timeline. (1)As media timeline. (1)
As media timeline. (1)
 

Kürzlich hochgeladen

Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)Commit University
 
Artificial Intelligence & SEO Trends for 2024
Artificial Intelligence & SEO Trends for 2024Artificial Intelligence & SEO Trends for 2024
Artificial Intelligence & SEO Trends for 2024D Cloud Solutions
 
OpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureOpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureEric D. Schabell
 
COMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a WebsiteCOMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a Websitedgelyza
 
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...Will Schroeder
 
The Kubernetes Gateway API and its role in Cloud Native API Management
The Kubernetes Gateway API and its role in Cloud Native API ManagementThe Kubernetes Gateway API and its role in Cloud Native API Management
The Kubernetes Gateway API and its role in Cloud Native API ManagementNuwan Dias
 
UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7DianaGray10
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfinfogdgmi
 
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve DecarbonizationUsing IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve DecarbonizationIES VE
 
Comparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioComparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioChristian Posta
 
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UbiTrack UK
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsSeth Reyes
 
UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6DianaGray10
 
Bird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystemBird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystemAsko Soukka
 
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019IES VE
 
The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...
The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...
The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...Aggregage
 
ADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDE
ADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDEADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDE
ADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDELiveplex
 
Nanopower In Semiconductor Industry.pdf
Nanopower  In Semiconductor Industry.pdfNanopower  In Semiconductor Industry.pdf
Nanopower In Semiconductor Industry.pdfPedro Manuel
 
Introduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptxIntroduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptxMatsuo Lab
 

Kürzlich hochgeladen (20)

Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)Crea il tuo assistente AI con lo Stregatto (open source python framework)
Crea il tuo assistente AI con lo Stregatto (open source python framework)
 
Artificial Intelligence & SEO Trends for 2024
Artificial Intelligence & SEO Trends for 2024Artificial Intelligence & SEO Trends for 2024
Artificial Intelligence & SEO Trends for 2024
 
OpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability AdventureOpenShift Commons Paris - Choose Your Own Observability Adventure
OpenShift Commons Paris - Choose Your Own Observability Adventure
 
COMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a WebsiteCOMPUTER 10 Lesson 8 - Building a Website
COMPUTER 10 Lesson 8 - Building a Website
 
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
Apres-Cyber - The Data Dilemma: Bridging Offensive Operations and Machine Lea...
 
The Kubernetes Gateway API and its role in Cloud Native API Management
The Kubernetes Gateway API and its role in Cloud Native API ManagementThe Kubernetes Gateway API and its role in Cloud Native API Management
The Kubernetes Gateway API and its role in Cloud Native API Management
 
UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7UiPath Studio Web workshop series - Day 7
UiPath Studio Web workshop series - Day 7
 
Videogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdfVideogame localization & technology_ how to enhance the power of translation.pdf
Videogame localization & technology_ how to enhance the power of translation.pdf
 
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve DecarbonizationUsing IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
Using IESVE for Loads, Sizing and Heat Pump Modeling to Achieve Decarbonization
 
Comparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and IstioComparing Sidecar-less Service Mesh from Cilium and Istio
Comparing Sidecar-less Service Mesh from Cilium and Istio
 
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
UWB Technology for Enhanced Indoor and Outdoor Positioning in Physiological M...
 
Computer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and HazardsComputer 10: Lesson 10 - Online Crimes and Hazards
Computer 10: Lesson 10 - Online Crimes and Hazards
 
UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6UiPath Studio Web workshop series - Day 6
UiPath Studio Web workshop series - Day 6
 
20230104 - machine vision
20230104 - machine vision20230104 - machine vision
20230104 - machine vision
 
Bird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystemBird eye's view on Camunda open source ecosystem
Bird eye's view on Camunda open source ecosystem
 
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
IESVE Software for Florida Code Compliance Using ASHRAE 90.1-2019
 
The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...
The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...
The Data Metaverse: Unpacking the Roles, Use Cases, and Tech Trends in Data a...
 
ADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDE
ADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDEADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDE
ADOPTING WEB 3 FOR YOUR BUSINESS: A STEP-BY-STEP GUIDE
 
Nanopower In Semiconductor Industry.pdf
Nanopower  In Semiconductor Industry.pdfNanopower  In Semiconductor Industry.pdf
Nanopower In Semiconductor Industry.pdf
 
Introduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptxIntroduction to Matsuo Laboratory (ENG).pptx
Introduction to Matsuo Laboratory (ENG).pptx
 

A brief history of backup and storage

  • 1. A Brief History of Backup and Storage 1775 1846 1951 1952 1956 1971 1972 1985 Punch Card Magnetic Cassette Hard Tape Drive Floppy Computer- Punch Tape Tape Disk Readable Drive CD-ROM
  • 2. PUNCH CARD In common use until mid-1970s, when replaced by magnetic tape Used as early as 1725 in textile industry for controlling mechanized textile looms Approximate Years in Use: 1725 - 1925
  • 3. PUNCH TAPE Originally pioneered by textile industry for use with mechanized looms Each row on tape represented one character Approximate Years in Use: 1846 - 1990s
  • 4. MAGNETIC TAPE First used in 1951 to record computer data on the Eckert- Mauchly UNIVAC I Tapes were metal and 1200 feet long (365 meters) and very heavy Long length made it prone to tears and breaks Approximate Years in Use: 1951- present
  • 5. TAPE DRIVE Introduced in 1952 by IBM Used vacuum columns to buffer nickel-plated magnetic tape to prevent media from tearing Some tapes were 1,200 feet long Replaced equivalent of 12,500 punch cards Capacity of 2 million digits per tape Approximate Years in Use: 1951- present
  • 6. HARD DRIVE First hard disk drive, IBM Model 350 Disk File, shipped in 1956 with IBM 305 RAMAC computer. Computer itself was 30’ by 50” (9m x 15m); storage device itself—the first commercial hard disk drive– was a 1.5-meter cube. Approximate Years in Use: 1956- present
  • 7. FLOPPY DISK First floppy disk released by IBM in 1971. Read-only, 8″ in diameter, stored 80 kB Intended as portable, more reliable medium vs punched cards, magnetic tape 8” disks too large for new microcomputers of 1970s, so 5¼” disk created; 3½” floppy followed Approximate Years in Use: 1971- 1982 (8” & 5 ¼”) 1982-2009 (3 ½”)
  • 8. CASSETTE Introduced for audio use by Philips in Europe in 1963 Introduced in 1972 as storage medium for PCs Standard 90-minute cassette stored 700KB of data per side Used on ZX Spectrum, TRS-80, Commodore 64, and others Approximate Years in Use: 1972 to late 1980s
  • 9. COMPUTER-READABLE CD-ROM Optical disc invented in 1958; first commercial product, Laserdisk, introduced in 1978 First audio compact disc introduced in 1982; eventually obsoleted magnetic tape Computer-readable data-storing CD- ROMs introduced in 1985. By late ’90s, CD-ROM disks and drives had obsoleted floppies Approximate Years in Use: 1985- present