| Oct | Dec | Hex | Symbol | Description |
| 000 | 0 | 0x00 | NUL | Null Character |
| 001 | 1 | 0x01 | SOH | Control-A |
| 002 | 2 | 0x02 | STX | Control-B |
| 003 | 3 | 0x03 | ETX | Control-C |
| 004 | 4 | 0x04 | EOT | Control-D |
| 005 | 5 | 0x05 | ENQ | Control-E |
| 006 | 6 | 0x06 | ACK | Control-F |
| 007 | 7 | 0x07 | BEL | Control-G |
| 010 | 8 | 0x08 | BS | backspace, Control-H |
| 011 | 9 | 0x09 | HT | tab, Control-I |
| 012 | 10 | 0x0a | LF | line feed, newline, Control-J |
| 013 | 11 | 0x0b | VT | Control-K |
| 014 | 12 | 0x0c | FF | form feed, NP, Control-L |
| 015 | 13 | 0x0d | CR | carriage return, Control-M |
| 016 | 14 | 0x0e | SO | Control-N |
| 017 | 15 | 0x0f | SI | Control-O |
| 020 | 16 | 0x10 | DLE | Control-P |
| 021 | 17 | 0x11 | DC1 | XON, Control-Q |
| 022 | 18 | 0x12 | DC2 | Control-R |
| 023 | 19 | 0x13 | DC3 | XOFF, Control-S |
| 024 | 20 | 0x14 | DC4 | Control-T |
| 025 | 21 | 0x15 | NAK | Control-U |
| 026 | 22 | 0x16 | SYN | Control-V |
| 027 | 23 | 0x17 | ETB | Control-W |
| 030 | 24 | 0x18 | CAN | Control-X |
| 031 | 25 | 0x19 | EM | Control-Y |
| 032 | 26 | 0x1a | SUB | Control-Z |
| 033 | 27 | 0x1b | ESC | escape |
| 034 | 28 | 0x1c | FS | File Separator |
| 035 | 29 | 0x1d | GS | Group Separator |
| 036 | 30 | 0x1e | RS | Record Separator |
| 037 | 31 | 0x1f | US | Unit Separator |
| 040 | 32 | 0x20 | SP | Space |
| 041 | 33 | 0x21 | ! | exclamation mark |
| 042 | 34 | 0x22 | " | double quote |
| 043 | 35 | 0x23 | # | hash |
| 044 | 36 | 0x24 | $ | dollar |
| 045 | 37 | 0x25 | % | percent |
| 046 | 38 | 0x26 | & | ampersand |
| 047 | 39 | 0x27 | ' | quote |
| 050 | 40 | 0x28 | ( | open parenthesis |
| 051 | 41 | 0x29 | ) | close parenthesis |
| 052 | 42 | 0x2a | * | asterisk |
| 053 | 43 | 0x2b | + | plus |
| 054 | 44 | 0x2c | , | comma |
| 055 | 45 | 0x2d | - | minus |
| 056 | 46 | 0x2e | . | full stop |
| 057 | 47 | 0x2f | / | oblique stroke |
| 060 | 48 | 0x30 | 0 | zero |
| 061 | 49 | 0x31 | 1 | one |
| 062 | 50 | 0x32 | 2 | two |
| 063 | 51 | 0x33 | 3 | three |
| 064 | 52 | 0x34 | 4 | four |
| 065 | 53 | 0x35 | 5 | five |
| 066 | 54 | 0x36 | 6 | six |
| 067 | 55 | 0x37 | 7 | seven |
| 070 | 56 | 0x38 | 8 | eight |
| 071 | 57 | 0x39 | 9 | nine |
| 072 | 58 | 0x3a | : | colon |
| 073 | 59 | 0x3b | ; | semicolon |
| 074 | 60 | 0x3c | less than | |
| 075 | 61 | 0x3d | = | equals |
| 076 | 62 | 0x3e | > | greater than |
| 077 | 63 | 0x3f | ? | question mark |
| 0100 | 64 | 0x40 | @ | commercial at |
| 0101 | 65 | 0x41 | A | Uppercase A |
| 0102 | 66 | 0x42 | B | Uppercase B |
| 0103 | 67 | 0x43 | C | Uppercase C |
| 0104 | 68 | 0x44 | D | Uppercase D |
| 0105 | 69 | 0x45 | E | Uppercase E |
| 0106 | 70 | 0x46 | F | Uppercase F |
| 0107 | 71 | 0x47 | G | Uppercase G |
| 0110 | 72 | 0x48 | H | Uppercase H |
| 0111 | 73 | 0x49 | I | Uppercase I |
| 0112 | 74 | 0x4a | J | Uppercase J |
| 0113 | 75 | 0x4b | K | Uppercase K |
| 0114 | 76 | 0x4c | L | Uppercase L |
| 0115 | 77 | 0x4d | M | Uppercase M |
| 0116 | 78 | 0x4e | N | Uppercase N |
| 0117 | 79 | 0x4f | O | Uppercase O |
| 0120 | 80 | 0x50 | P | Uppercase P |
| 0121 | 81 | 0x51 | Q | Uppercase Q |
| 0122 | 82 | 0x52 | R | Uppercase R |
| 0123 | 83 | 0x53 | S | Uppercase S |
| 0124 | 84 | 0x54 | T | Uppercase T |
| 0125 | 85 | 0x55 | U | Uppercase U |
| 0126 | 86 | 0x56 | V | Uppercase V |
| 0127 | 87 | 0x57 | W | Uppercase W |
| 0130 | 88 | 0x58 | X | Uppercase X |
| 0131 | 89 | 0x59 | Y | Uppercase Y |
| 0132 | 90 | 0x5a | Z | Uppercase Z |
| 0133 | 91 | 0x5b | [ | open square bracket |
| 0134 | 92 | 0x5c | backslash | |
| 0135 | 93 | 0x5d | ] | close square bracket |
| 0136 | 94 | 0x5e | ^ | caret |
| 0137 | 95 | 0x5f | _ | underscore |
| 0140 | 96 | 0x60 | ` | back quote |
| 0141 | 97 | 0x61 | a | Lowercase a |
| 0142 | 98 | 0x62 | b | Lowercase b |
| 0143 | 99 | 0x63 | c | Lowercase c |
| 0144 | 100 | 0x64 | d | Lowercase d |
| 0145 | 101 | 0x65 | e | Lowercase e |
| 0146 | 102 | 0x66 | f | Lowercase f |
| 0147 | 103 | 0x67 | g | Lowercase g |
| 0150 | 104 | 0x68 | h | Lowercase h |
| 0151 | 105 | 0x69 | i | Lowercase i |
| 0152 | 106 | 0x6a | j | Lowercase j |
| 0153 | 107 | 0x6b | k | Lowercase k |
| 0154 | 108 | 0x6c | l | Lowercase l |
| 0155 | 109 | 0x6d | m | Lowercase m |
| 0156 | 110 | 0x6e | n | Lowercase n |
| 0157 | 111 | 0x6f | o | Lowercase o |
| 0160 | 112 | 0x70 | p | Lowercase p |
| 0161 | 113 | 0x71 | q | Lowercase q |
| 0162 | 114 | 0x72 | r | Lowercase r |
| 0163 | 115 | 0x73 | s | Lowercase s |
| 0164 | 116 | 0x74 | t | Lowercase t |
| 0165 | 117 | 0x75 | u | Lowercase u |
| 0166 | 118 | 0x76 | v | Lowercase v |
| 0167 | 119 | 0x77 | w | Lowercase w |
| 0170 | 120 | 0x78 | x | Lowercase x |
| 0171 | 121 | 0x79 | y | Lowercase y |
| 0172 | 122 | 0x7a | z | Lowercase z |
| 0173 | 123 | 0x7b | { | open curly bracket |
| 0174 | 124 | 0x7c | | | vertical bar |
| 0175 | 125 | 0x7d | } | close curly bracket |
| 0176 | 126 | 0x7e | ~ | tilde |
| 0177 | 127 | 0x7f | delete |
Bilgisayar geçici hafızasıdır.Yapılan ilk işlemler, RAM'de gerçekleşir.Kayıt edilmediği veya bilgisayar kapatıldığı taktirde bilgiler silinir o yüzden birimi hafıza birimi olan MB vey GB dir.
Temel parça ve merkezdir.Tüm elektronik devreler anakart üzerindedir.İşlemci, RAM, ses ve ekran kartları, modem gibi donanımları taşır.Anakart üzerinde, yeni donanım eklemek için boşluklar hazırlanmıştır.
