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Storage devices

Storage devices. Bits, Bytes, Kilobytes, MB, GB, Terabytes Hardware Moore’s law Disks Internal hard disk 500 GB – 2 TB (50-100 €) External hard disk 500 GB – 2 TB (50-100 €) Solid State Drive SSD 60 GB – 500 GB (50-300 €). Storage devices. Discs CD 700 MB and DVD 4 GB (~ 1 €)

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Storage devices

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  1. Storage devices • Bits, Bytes, Kilobytes, MB, GB, Terabytes • Hardware • Moore’s law • Disks • Internal hard disk 500 GB – 2 TB (50-100 €) • External hard disk 500 GB – 2 TB (50-100 €) • Solid State Drive SSD 60 GB – 500 GB (50-300 €) Computer introduction

  2. Storage devices • Discs • CD 700 MB and DVD 4 GB (~ 1 €) • Single use R or rewritable RW • Need a writer to be written • Blu-ray 25 GB (~ 5 €) Computer introduction

  3. Storage devices • Memory • USB pen drive or memory stick • 4-64 GB (5-80 €) • Used mostly to move data • Memory cards • Camera, phones, players Computer introduction

  4. Software • Software types • Operating system • Takes care of devices • User-computer interface • Windows OS X Linux • Android iOS Windows Phone • Program files (Word, Excel, Skype, …) • Data files Computer introduction

  5. Software licenses • Cost • Freeware (Skype; Linux) • Shareware (mobile phone apps) • Commercial (Windows; Photoshop) • Subscription (Office 365) • Private • Permission to modify • Free or Open Source (Linux) • Proprietary (Acrobat Reader; WinZip; Office) Computer introduction

  6. Software naming • Name • Linux, Microsoft Office, Microsoft Windows • Distribution/edition • Linux Ubuntu • Microsoft Office Professional • Microsoft Windows Enterprise • Version (usually numeric but may be a name) • Linux Ubuntu 13.10 • Microsoft Office Professional 2013 • Microsoft Windows 7 Enterprise Computer introduction

  7. Data format • Open • GIF, PDF, HTML • Closed proprietary • DOC • Open proprietary • DOCX Computer introduction

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