Section 171-01: General | ![](/icons/ecblank.gif) |
| 171-01-01 | | information | ![](/icons/ecblank.gif) |
| 171-01-02 | | data | ![](/icons/ecblank.gif) |
| 171-01-03 | | signal | ![](/icons/ecblank.gif) |
| 171-01-04 | | analogue, adj | ![](/icons/ecblank.gif) |
| 171-01-05 | | discrete, adj | ![](/icons/ecblank.gif) |
| 171-01-06 | | discrete value | ![](/icons/ecblank.gif) |
| 171-01-07 | | digital, adj | ![](/icons/ecblank.gif) |
| 171-01-08 | | hybrid, <for representation of information> adj | ![](/icons/ecblank.gif) |
| 171-01-09 | | continuous-value signal | ![](/icons/ecblank.gif) |
| 171-01-10 | | continuous-time signal | ![](/icons/ecblank.gif) |
| 171-01-11 | | discrete-value signal | ![](/icons/ecblank.gif) |
| 171-01-12 | | discretely timed signal | ![](/icons/ecblank.gif) |
| 171-01-13 | | digital signal | ![](/icons/ecblank.gif) |
| 171-01-14 | | analogue signal | ![](/icons/ecblank.gif) |
| 171-01-15 | | code | ![](/icons/ecblank.gif) |
| 171-01-16 | | digital technology | ![](/icons/ecblank.gif) |
| 171-01-17 | | data processing | ![](/icons/ecblank.gif) |
| 171-01-18 | | automatic data processing | ![](/icons/ecblank.gif) |
| 171-01-19 | | information processing | ![](/icons/ecblank.gif) |
| 171-01-20 | | hardware, <in information processing> | ![](/icons/ecblank.gif) |
| 171-01-21 | | software | ![](/icons/ecblank.gif) |
| 171-01-22 | | functional unit, <in information processing> | ![](/icons/ecblank.gif) |
| 171-01-23 | | resource, <in computer technology> | ![](/icons/ecblank.gif) |
| 171-01-24 | | interface | ![](/icons/ecblank.gif) |
| 171-01-25 | | computer | ![](/icons/ecblank.gif) |
| 171-01-26 | | data processing system | ![](/icons/ecblank.gif) |
| 171-01-27 | | computer science | ![](/icons/ecblank.gif) |
Section 171-02: Organization and representation of data | ![](/icons/ecblank.gif) |
| 171-02-01 | | data element | ![](/icons/ecblank.gif) |
| 171-02-02 | | n-ary, adj | ![](/icons/ecblank.gif) |
| 171-02-03 | | binary, adj | ![](/icons/ecblank.gif) |
| 171-02-04 | | ternary, adj | ![](/icons/ecblank.gif) |
| 171-02-05 | | octal, adj | ![](/icons/ecblank.gif) |
| 171-02-06 | | decimal, adj | ![](/icons/ecblank.gif) |
| 171-02-07 | | duodecimal, adj | ![](/icons/ecblank.gif) |
| 171-02-08 | | hexadecimal, adj | ![](/icons/ecblank.gif) |
| 171-02-09 | | amount of data | ![](/icons/ecblank.gif) |
| 171-02-10 | | binary digit | ![](/icons/ecblank.gif) |
| 171-02-11 | | bit, <unit> | ![](/icons/ecblank.gif) |
| 171-02-12 | | byte, <data element> | ![](/icons/ecblank.gif) |
| 171-02-13 | | byte, <unit> | ![](/icons/ecblank.gif) |
| 171-02-14 | | kibi | ![](/icons/ecblank.gif) |
| 171-02-15 | | mebi | ![](/icons/ecblank.gif) |
| 171-02-16 | | gibi | ![](/icons/ecblank.gif) |
| 171-02-17 | | tebi | ![](/icons/ecblank.gif) |
| 171-02-18 | | pebi | ![](/icons/ecblank.gif) |
| 171-02-19 | | exbi | ![](/icons/ecblank.gif) |
| 171-02-20 | | zebi | ![](/icons/ecblank.gif) |
| 171-02-21 | | yobi | ![](/icons/ecblank.gif) |
| 171-02-22 | | n-bit byte | ![](/icons/ecblank.gif) |
| 171-02-23 | | n-bit byte, <exactly n> | ![](/icons/ecblank.gif) |
| 171-02-24 | | character set | ![](/icons/ecblank.gif) |
| 171-02-25 | | alphabet | ![](/icons/ecblank.gif) |
| 171-02-26 | | string | ![](/icons/ecblank.gif) |
| 171-02-27 | | word | ![](/icons/ecblank.gif) |
| 171-02-28 | | record, <in data processing> | ![](/icons/ecblank.gif) |
| 171-02-29 | | field, <in software> | ![](/icons/ecblank.gif) |
| 171-02-30 | | file | ![](/icons/ecblank.gif) |
| 171-02-31 | | table | ![](/icons/ecblank.gif) |
| 171-02-32 | | list | ![](/icons/ecblank.gif) |
| 171-02-33 | | queue | ![](/icons/ecblank.gif) |
| 171-02-34 | | mean queue length | ![](/icons/ecblank.gif) |
| 171-02-35 | | identifier | ![](/icons/ecblank.gif) |
| 171-02-36 | | key, <in organization of data> | ![](/icons/ecblank.gif) |
| 171-02-37 | | label, <in organization of data> | ![](/icons/ecblank.gif) |
| 171-02-38 | | pointer | ![](/icons/ecblank.gif) |
| 171-02-39 | | delimiter | ![](/icons/ecblank.gif) |
| 171-02-40 | | convert, <in data processing> verb | ![](/icons/ecblank.gif) |
| 171-02-41 | | read, verb | ![](/icons/ecblank.gif) |
| 171-02-42 | | write, verb | ![](/icons/ecblank.gif) |
| 171-02-43 | | delete, verb | ![](/icons/ecblank.gif) |
| 171-02-44 | | order | ![](/icons/ecblank.gif) |
| 171-02-45 | | sequence, <in organization of data> | ![](/icons/ecblank.gif) |
| 171-02-46 | | syntax | ![](/icons/ecblank.gif) |
| 171-02-47 | | bar code | ![](/icons/ecblank.gif) |
Section 171-03: Logic operations | ![](/icons/ecblank.gif) |
| 171-03-01 | | logic, adj | ![](/icons/ecblank.gif) |
| 171-03-02 | | logic operation | ![](/icons/ecblank.gif) |
| 171-03-03 | | operator | ![](/icons/ecblank.gif) |
| 171-03-04 | | operand | ![](/icons/ecblank.gif) |
| 171-03-05 | | Boolean operation | ![](/icons/ecblank.gif) |
| 171-03-06 | | Boolean operator | ![](/icons/ecblank.gif) |
| 171-03-07 | | n-adic Boolean operation | ![](/icons/ecblank.gif) |
| 171-03-08 | | dyadic Boolean operation | ![](/icons/ecblank.gif) |
| 171-03-09 | | monadic Boolean operation | ![](/icons/ecblank.gif) |
| 171-03-10 | | negation | ![](/icons/ecblank.gif) |
| 171-03-11 | | complementary operation | ![](/icons/ecblank.gif) |
| 171-03-12 | | dual operation | ![](/icons/ecblank.gif) |
| 171-03-13 | | identity operation | ![](/icons/ecblank.gif) |
| 171-03-14 | | non-identity operation | ![](/icons/ecblank.gif) |
| 171-03-15 | | equivalence operation | ![](/icons/ecblank.gif) |
| 171-03-16 | | exclusive-or operation | ![](/icons/ecblank.gif) |
| 171-03-17 | | conjunction | ![](/icons/ecblank.gif) |
| 171-03-18 | | non-conjunction | ![](/icons/ecblank.gif) |
| 171-03-19 | | disjunction | ![](/icons/ecblank.gif) |
| 171-03-20 | | non-disjunction | ![](/icons/ecblank.gif) |
| 171-03-21 | | exclusion | ![](/icons/ecblank.gif) |
| 171-03-22 | | implication | ![](/icons/ecblank.gif) |
Section 171-04: Hardware | ![](/icons/ecblank.gif) |
| 171-04-01 | | processor | ![](/icons/ecblank.gif) |
| 171-04-02 | | instruction control unit | ![](/icons/ecblank.gif) |
| 171-04-03 | | arithmetic and logic unit | ![](/icons/ecblank.gif) |
| 171-04-04 | | processing unit | ![](/icons/ecblank.gif) |
| 171-04-05 | | central processing unit | ![](/icons/ecblank.gif) |
| 171-04-06 | | microprocessor | ![](/icons/ecblank.gif) |
| 171-04-07 | | peripheral equipment | ![](/icons/ecblank.gif) |
| 171-04-08 | | supercomputer | ![](/icons/ecblank.gif) |
| 171-04-09 | | personal computer | ![](/icons/ecblank.gif) |
| 171-04-10 | | portable computer | ![](/icons/ecblank.gif) |
| 171-04-11 | | tablet computer | ![](/icons/ecblank.gif) |
| 171-04-12 | | calculator | ![](/icons/ecblank.gif) |
| 171-04-13 | | array processor | ![](/icons/ecblank.gif) |
| 171-04-14 | | storage device | ![](/icons/ecblank.gif) |
| 171-04-15 | | memory | ![](/icons/ecblank.gif) |
| 171-04-16 | | storage capacity | ![](/icons/ecblank.gif) |
| 171-04-17 | | equivalent binary storage capacity | ![](/icons/ecblank.gif) |
| 171-04-18 | | internal storage | ![](/icons/ecblank.gif) |
| 171-04-19 | | register | ![](/icons/ecblank.gif) |
| 171-04-20 | | buffer storage | ![](/icons/ecblank.gif) |
| 171-04-21 | | main storage | ![](/icons/ecblank.gif) |
| 171-04-22 | | input-output channel | ![](/icons/ecblank.gif) |
| 171-04-23 | | external storage | ![](/icons/ecblank.gif) |
| 171-04-24 | | direct access | ![](/icons/ecblank.gif) |
| 171-04-25 | | direct access storage | ![](/icons/ecblank.gif) |
| 171-04-26 | | read-only memory | ![](/icons/ecblank.gif) |
| 171-04-27 | | RAM | ![](/icons/ecblank.gif) |
| 171-04-28 | | permanent storage | ![](/icons/ecblank.gif) |
| 171-04-29 | | erasable storage | ![](/icons/ecblank.gif) |
| 171-04-30 | | electrically alterable storage | ![](/icons/ecblank.gif) |
| 171-04-31 | | volatile storage | ![](/icons/ecblank.gif) |
| 171-04-32 | | non-volatile storage | ![](/icons/ecblank.gif) |
| 171-04-33 | | direct memory access | ![](/icons/ecblank.gif) |
| 171-04-34 | | sequential access | ![](/icons/ecblank.gif) |
| 171-04-35 | | cache memory | ![](/icons/ecblank.gif) |
| 171-04-36 | | input device, <in data processing> | ![](/icons/ecblank.gif) |
| 171-04-37 | | output device, <in data processing> | ![](/icons/ecblank.gif) |
| 171-04-38 | | keyboard | ![](/icons/ecblank.gif) |
| 171-04-39 | | computer screen | ![](/icons/ecblank.gif) |
| 171-04-40 | | pointing device | ![](/icons/ecblank.gif) |
| 171-04-41 | | mouse | ![](/icons/ecblank.gif) |
| 171-04-42 | | touchpad | ![](/icons/ecblank.gif) |
| 171-04-43 | | joystick | ![](/icons/ecblank.gif) |
| 171-04-44 | | thumbwheel | ![](/icons/ecblank.gif) |
| 171-04-45 | | trackball | ![](/icons/ecblank.gif) |
| 171-04-46 | | printer | ![](/icons/ecblank.gif) |
| 171-04-47 | | scanner | ![](/icons/ecblank.gif) |
| 171-04-48 | | universal serial bus | ![](/icons/ecblank.gif) |
Section 171-05: Software | ![](/icons/ecblank.gif) |
| 171-05-01 | | operating system | ![](/icons/ecblank.gif) |
| 171-05-02 | | kernel, <of an operating system> | ![](/icons/ecblank.gif) |
| 171-05-03 | | firmware | ![](/icons/ecblank.gif) |
| 171-05-04 | | application software | ![](/icons/ecblank.gif) |
| 171-05-05 | | computer program | ![](/icons/ecblank.gif) |
| 171-05-06 | | application program | ![](/icons/ecblank.gif) |
| 171-05-07 | | algorithm | ![](/icons/ecblank.gif) |
| 171-05-08 | | instruction, <in computer programs> | ![](/icons/ecblank.gif) |
| 171-05-09 | | machine instruction | ![](/icons/ecblank.gif) |
| 171-05-10 | | programming language | ![](/icons/ecblank.gif) |
| 171-05-11 | | high-level language | ![](/icons/ecblank.gif) |
| 171-05-12 | | machine-oriented language | ![](/icons/ecblank.gif) |
| 171-05-13 | | machine language | ![](/icons/ecblank.gif) |
| 171-05-14 | | command language | ![](/icons/ecblank.gif) |
| 171-05-15 | | assembly language | ![](/icons/ecblank.gif) |
| 171-05-16 | | assemble, verb | ![](/icons/ecblank.gif) |
| 171-05-17 | | assembler | ![](/icons/ecblank.gif) |
| 171-05-18 | | source language | ![](/icons/ecblank.gif) |
| 171-05-19 | | source program | ![](/icons/ecblank.gif) |
| 171-05-20 | | object language | ![](/icons/ecblank.gif) |
| 171-05-21 | | object program | ![](/icons/ecblank.gif) |
| 171-05-22 | | man-machine language | ![](/icons/ecblank.gif) |
| 171-05-23 | | programming system | ![](/icons/ecblank.gif) |
| 171-05-24 | | translate, verb | ![](/icons/ecblank.gif) |
| 171-05-25 | | translator | ![](/icons/ecblank.gif) |
| 171-05-26 | | compile, verb | ![](/icons/ecblank.gif) |
| 171-05-27 | | compiler | ![](/icons/ecblank.gif) |
| 171-05-28 | | interpret, verb | ![](/icons/ecblank.gif) |
| 171-05-29 | | map over, verb | ![](/icons/ecblank.gif) |
| 171-05-30 | | interrupt | ![](/icons/ecblank.gif) |
| 171-05-31 | | debug, verb | ![](/icons/ecblank.gif) |
| 171-05-32 | | dump, verb | ![](/icons/ecblank.gif) |
| 171-05-33 | | microprogram | ![](/icons/ecblank.gif) |
| 171-05-34 | | microinstruction | ![](/icons/ecblank.gif) |
| 171-05-35 | | address, <in software> | ![](/icons/ecblank.gif) |
| 171-05-36 | | absolute address | ![](/icons/ecblank.gif) |
| 171-05-37 | | direct address | ![](/icons/ecblank.gif) |
| 171-05-38 | | indirect address | ![](/icons/ecblank.gif) |
| 171-05-39 | | base address | ![](/icons/ecblank.gif) |
| 171-05-40 | | relocatable address | ![](/icons/ecblank.gif) |
| 171-05-41 | | parameter | ![](/icons/ecblank.gif) |
| 171-05-42 | | routine | ![](/icons/ecblank.gif) |
| 171-05-43 | | subprogram | ![](/icons/ecblank.gif) |
| 171-05-44 | | function, <in computer programming> | ![](/icons/ecblank.gif) |
| 171-05-45 | | procedure, <in computer programming> | ![](/icons/ecblank.gif) |
| 171-05-46 | | call, <in software> | ![](/icons/ecblank.gif) |
| 171-05-47 | | link, <in programming> noun | ![](/icons/ecblank.gif) |
| 171-05-48 | | link, <in programming> verb | ![](/icons/ecblank.gif) |
| 171-05-49 | | macroinstruction | ![](/icons/ecblank.gif) |
| 171-05-50 | | conversational mode | ![](/icons/ecblank.gif) |
| 171-05-51 | | time-sharing | ![](/icons/ecblank.gif) |
| 171-05-52 | | time-slicing | ![](/icons/ecblank.gif) |
| 171-05-53 | | real-time, adj | ![](/icons/ecblank.gif) |
| 171-05-54 | | pack, verb | ![](/icons/ecblank.gif) |
| 171-05-55 | | relocate, verb | ![](/icons/ecblank.gif) |
| 171-05-56 | | search, noun | ![](/icons/ecblank.gif) |
| 171-05-57 | | chaining search | ![](/icons/ecblank.gif) |
| 171-05-58 | | dichotomizing search | ![](/icons/ecblank.gif) |
| 171-05-59 | | patch, verb | ![](/icons/ecblank.gif) |
| 171-05-60 | | reusable, adj | ![](/icons/ecblank.gif) |
| 171-05-61 | | reentrant, adj | ![](/icons/ecblank.gif) |
| 171-05-62 | | load, <in computer technology> verb | ![](/icons/ecblank.gif) |
| 171-05-63 | | sequential, adj | ![](/icons/ecblank.gif) |
| 171-05-64 | | concurrent, adj | ![](/icons/ecblank.gif) |
| 171-05-65 | | consecutive, adj | ![](/icons/ecblank.gif) |
| 171-05-66 | | default, adj | ![](/icons/ecblank.gif) |
| 171-05-67 | | markup language | ![](/icons/ecblank.gif) |
| 171-05-68 | | task, <in programming> | ![](/icons/ecblank.gif) |
| 171-05-69 | | multitasking | ![](/icons/ecblank.gif) |
| 171-05-70 | | exception | ![](/icons/ecblank.gif) |
Section 171-06: Data transfer | ![](/icons/ecblank.gif) |
| 171-06-01 | | transfer, verb | ![](/icons/ecblank.gif) |
| 171-06-02 | | transmit, verb | ![](/icons/ecblank.gif) |
| 171-06-03 | | transfer rate | ![](/icons/ecblank.gif) |
| 171-06-04 | | data signalling rate | ![](/icons/ecblank.gif) |
| 171-06-05 | | period of data elements | ![](/icons/ecblank.gif) |
| 171-06-06 | | period of binary digits | ![](/icons/ecblank.gif) |
| 171-06-07 | | signal energy per binary digit | ![](/icons/ecblank.gif) |
| 171-06-08 | | error probability | ![](/icons/ecblank.gif) |
Section 171-07: Information theory | ![](/icons/ecblank.gif) |
| 171-07-01 | | information theory | ![](/icons/ecblank.gif) |
| 171-07-02 | | communication theory | ![](/icons/ecblank.gif) |
| 171-07-03 | | information, <in information theory> | ![](/icons/ecblank.gif) |
| 171-07-04 | | message, <in information theory and communication theory> | ![](/icons/ecblank.gif) |
| 171-07-05 | | message source | ![](/icons/ecblank.gif) |
| 171-07-06 | | message sink | ![](/icons/ecblank.gif) |
| 171-07-07 | | channel, <in communication theory> | ![](/icons/ecblank.gif) |
| 171-07-08 | | symmetric binary channel | ![](/icons/ecblank.gif) |
| 171-07-09 | | stationary message source | ![](/icons/ecblank.gif) |
| 171-07-10 | | decision content | ![](/icons/ecblank.gif) |
| 171-07-11 | | shannon | ![](/icons/ecblank.gif) |
| 171-07-12 | | hartley | ![](/icons/ecblank.gif) |
| 171-07-13 | | natural unit, <in information theory> | ![](/icons/ecblank.gif) |
| 171-07-14 | | information content | ![](/icons/ecblank.gif) |
| 171-07-15 | | entropy, <in information theory> | ![](/icons/ecblank.gif) |
| 171-07-16 | | maximum entropy | ![](/icons/ecblank.gif) |
| 171-07-17 | | relative entropy | ![](/icons/ecblank.gif) |
| 171-07-18 | | redundancy, <in information theory> | ![](/icons/ecblank.gif) |
| 171-07-19 | | relative redundancy | ![](/icons/ecblank.gif) |
| 171-07-20 | | joint information content | ![](/icons/ecblank.gif) |
| 171-07-21 | | conditional information content | ![](/icons/ecblank.gif) |
| 171-07-22 | | joint entropy | ![](/icons/ecblank.gif) |
| 171-07-23 | | conditional entropy | ![](/icons/ecblank.gif) |
| 171-07-24 | | equivocation | ![](/icons/ecblank.gif) |
| 171-07-25 | | irrelevance | ![](/icons/ecblank.gif) |
| 171-07-26 | | transinformation content | ![](/icons/ecblank.gif) |
| 171-07-27 | | mean transinformation content | ![](/icons/ecblank.gif) |
| 171-07-28 | | character mean entropy | ![](/icons/ecblank.gif) |
| 171-07-29 | | average information rate | ![](/icons/ecblank.gif) |
| 171-07-30 | | character mean transinformation content | ![](/icons/ecblank.gif) |
| 171-07-31 | | average transinformation rate | ![](/icons/ecblank.gif) |
| 171-07-32 | | channel capacity per character | ![](/icons/ecblank.gif) |
| 171-07-33 | | channel time capacity | ![](/icons/ecblank.gif) |
Section 171-08: Security | ![](/icons/ecblank.gif) |
| 171-08-01 | | computer security | ![](/icons/ecblank.gif) |
| 171-08-02 | | computer safety | ![](/icons/ecblank.gif) |
| 171-08-03 | | cyberspace | ![](/icons/ecblank.gif) |
| 171-08-04 | | cyberspace security | ![](/icons/ecblank.gif) |
| 171-08-05 | | integrity, <of data> | ![](/icons/ecblank.gif) |
| 171-08-06 | | confidentiality | ![](/icons/ecblank.gif) |
| 171-08-07 | | authenticity | ![](/icons/ecblank.gif) |
| 171-08-08 | | cryptography | ![](/icons/ecblank.gif) |
| 171-08-09 | | encryption | ![](/icons/ecblank.gif) |
| 171-08-10 | | decryption | ![](/icons/ecblank.gif) |
| 171-08-11 | | digital signature | ![](/icons/ecblank.gif) |
| 171-08-12 | | attack | ![](/icons/ecblank.gif) |
| 171-08-13 | | threat | ![](/icons/ecblank.gif) |
| 171-08-14 | | malware | ![](/icons/ecblank.gif) |
Section 171-09: Applications | ![](/icons/ecblank.gif) |
| 171-09-01 | | office automation | ![](/icons/ecblank.gif) |
| 171-09-02 | | text processing | ![](/icons/ecblank.gif) |
| 171-09-03 | | electronic publishing | ![](/icons/ecblank.gif) |
| 171-09-04 | | spreadsheet program | ![](/icons/ecblank.gif) |
| 171-09-05 | | multimedia, adj | ![](/icons/ecblank.gif) |
| 171-09-06 | | hyperlink | ![](/icons/ecblank.gif) |
| 171-09-07 | | hypertext | ![](/icons/ecblank.gif) |
| 171-09-08 | | hypermedia, adj | ![](/icons/ecblank.gif) |
| 171-09-09 | | computer graphics | ![](/icons/ecblank.gif) |
| 171-09-10 | | embedded system | ![](/icons/ecblank.gif) |
| 171-09-11 | | social network | ![](/icons/ecblank.gif) |
| 171-09-12 | | cloud computing | ![](/icons/ecblank.gif) |
| 171-09-13 | | virtual reality | ![](/icons/ecblank.gif) |
| 171-09-14 | | digital cinema | ![](/icons/ecblank.gif) |
| 171-09-15 | | e-learning | ![](/icons/ecblank.gif) |
| 171-09-16 | | artificial intelligence, <discipline> | ![](/icons/ecblank.gif) |
| 171-09-17 | | artificial intelligence, <capability> | ![](/icons/ecblank.gif) |
| 171-09-18 | | expert system | ![](/icons/ecblank.gif) |
| 171-09-19 | | optical character recognition | ![](/icons/ecblank.gif) |
| 171-09-20 | | pattern recognition | ![](/icons/ecblank.gif) |
| 171-09-21 | | database | ![](/icons/ecblank.gif) |
| 171-09-22 | | database management system | ![](/icons/ecblank.gif) |
| 171-09-23 | | distributed data processing | ![](/icons/ecblank.gif) |
| 171-09-24 | | computer-aided, adj | ![](/icons/ecblank.gif) |
| 171-09-25 | | robot | ![](/icons/ecblank.gif) |
| 171-09-26 | | robotics | ![](/icons/ecblank.gif) |
| ![](/icons/ecblank.gif) |