#capacity.indefinite_quantity  (computer science) the amount of information (in bytes) that can be stored on a disk drive; "the capacity of a hard disk drive is usually expressed in megabytes"
  supertype:  #indefinite_quantity  an estimated quantity
  subtype:  #formatted_capacity__formattedcapacity  (computer science) the usable capacity of a disk drive; the amount of space that is left after the sector headings and boundary definitions and timing information have been added by formatting the disk
  subtype:  #unformatted_capacity__unformattedcapacity  (computer science) the total number of bytes on a disk including the space that will be required to format it
  subtype:  #computer_memory_unit  a unit for measuring computer memory
     subtype:  #bit  a unit of measurement of information (from Binary + digIT); the amount of information in a system having two equiprobable states; "there are 8 bits in a byte"
        subtype:  #parity_bit__parity  (computer science) Used in an error detection procedure in which a bit (0 or 1) added to each group of bits so that it will have either an odd number of 1's or an even number of 1's; e.g., if the parity is odd then any group of bits that arrives with an even number of 1's must contain an error
     subtype:  #nybble__nibble  a small byte
     subtype:  #byte  a sequence of 8 bits (enough to represent one character of alphanumeric data) processed as a single unit of information
     subtype:  #sector.computer_memory_unit  the minimum track length that can be assigned to store information; unless otherwise specified a sector of data consists of 512 bytes
     subtype:  #block.computer_memory_unit  (computer science) a sector or group of sectors that function as the smallest data unit permitted; "since blocks are often defined as a single sector, the terms `block' and `sector' are sometimes used interchangeably"
        subtype:  #bad_block__badblock  (computer science) a block (usually one sector) that cannot reliably hold data
     subtype:  #allocation_unit  a group of sectors on a magnetic disk that can be reserved for the use of a particular file
     subtype:  #partition  (computer science) the part of a hard disk that is dedicated to a particular operating system or application and accessed as a single unit
     subtype:  #word.computer_memory_unit  a word is a string of bits stored in computer memory; "large computers use words up to 64 bits long"
     subtype:  #kilobyte__Kilobyte__k__K__kb__kB__kb__Kb__KB  a unit of information equal to 1024 bytes
     subtype:  #megabit  $('<' #unit_of_measurement replaced by #computer_memory_unit)$ one million bits
     subtype:  #megabyte__Megabyte__Mb__MB  a unit of information equal to one million (1,048,576) bytes
     subtype:  #gigabyte__Gigabyte__G__Gb__GB  a unit of information equal to one billion (1,000,000,000) bytes or one thousand megabytes
     subtype:  #terabyte__Terabyte__T__Tb__TB  a unit of information equal to one trillion (1,000,000,000,000) bytes

1 statement is about an indirect instance of #capacity.indefinite_quantity (#computer_memory_unit): pm#graph1_on_file
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