Basic Computer Notions Hardware

Next Basic logic gates Basic logic gates (cont'd) Basic logic gates (cont'd) Basic logic gates (cont'd) Basic logic gates (cont'd) Basic logic gates (cont'd) Basic logic gates (cont'd) Basic logic gates (cont'd) Decimal number system Binary number system Decimal addition Decimal addition (cont'd) Decimal addition (cont'd) Decimal addition (cont'd) Binary addition Binary addition (cont'd) Binary addition (cont'd) Binary addition (cont'd) Binary addition (cont'd) Binary addition (cont'd) Decimal addition table Binary addition table Binary addition table (cont'd) Memory and storage devices Memory and storage devices (cont'd) Memory and storage devices (cont'd) Memory and storage devices (cont'd) Memory and storage devices (cont'd) Memory and storage devices (cont'd) 30 of 39 Analogue vs. digital Analogue vs. digital (cont'd) Analogue vs. digital (cont'd) Analogue vs. digital (cont'd) Analogue vs. digital (cont'd) Analogue vs. digital (cont'd) Digital-to-analogue conversion Analogue-to-digital conversion Analogue-to-digital conversion (cont'd)

The maximum number that can be stored in 64 bits (~2×1018)
‘is enough to provide a unique ID for one transaction per second for every person on the planet for the next 50 years. It is also the number of grains in about a cubic mile of sand.’
(From Special Edition Using Java, 2nd Edition)

1018 bits: estimated storage capacity of iPods sold in first 3 months of 2005.
(J. Cole (2005): Computer 38(9): 103)

‘Bits of genetic info’ doesn't include information other than base-pair sequences (e.g., Sci. Am., 2003 Nov & Dec)
‘No. of brain synapses’ as a measure of brain complexity doesn't include control by glial cells (e.g., Sci. Am., 2004 Dec)


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