U+0006 ACKNOWLEDGE*
U+0006 was added to Unicode in version 1.1. It belongs to the block 
Basic Latin in the Basic Multilingual Plane.
This character is a Control and is commonly used, that is, in no specific script. The character is also known as ACKNOWLEDGE.
The glyph is not a composition. It has a Neutral East Asian Width. In bidirectional context it acts as Boundary Neutral and is not mirrored. In text U+0006 behaves as Combining Mark regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Control.
Representations
| System | Representation |
|---|---|
| Nº | 6 |
| UTF-8 | 06 |
| UTF-16 | 00 06 |
| UTF-32 | 00 00 00 06 |
| URL-Quoted | %06 |
| HTML-Escape |  |
| digraph | AK |
| control | ACKNOWLEDGE |
| abbreviation | ACK |
| alias | ACKNOWLEDGE |
Elsewhere
Complete Record
| Property | Value |
|---|---|
| Age (age) | 1.1 |
| Unicode Name (na) | — |
| Unicode 1 Name (na1) | ACKNOWLEDGE |
| Block (blk) | ASCII |
| General Category (gc) | Control |
| Script (sc) | Common |
| Bidirectional Category (bc) | Boundary Neutral |
| Combining Class (ccc) | Not Reordered |
| Decomposition Type (dt) | None |
| Decomposition Mapping (dm) |
0006 |
| Lowercase (Lower) | ✘ |
| Simple Lowercase Mapping (slc) |
0006 |
| Lowercase Mapping (lc) |
0006 |
| Uppercase (Upper) | ✘ |
| Simple Uppercase Mapping (suc) |
0006 |
| Uppercase Mapping (uc) |
0006 |
| Simple Titlecase Mapping (stc) |
0006 |
| Titlecase Mapping (tc) |
0006 |
| Case Folding (cf) |
0006 |
| ASCII Hex Digit (AHex) | ✘ |
| Alphabetic (Alpha) | ✘ |
| Bidi Control (Bidi_C) | ✘ |
| Bidi Mirrored (Bidi_M) | ✘ |
| Cased (Cased) | ✘ |
| Composition Exclusion (CE) | ✘ |
| Case Ignorable (CI) | ✘ |
| Full Composition Exclusion (Comp_Ex) | ✘ |
| Changes When Casefolded (CWCF) | ✘ |
| Changes When Casemapped (CWCM) | ✘ |
| Changes When NFKC Casefolded (CWKCF) | ✘ |
| Changes When Lowercased (CWL) | ✘ |
| Changes When Titlecased (CWT) | ✘ |
| Changes When Uppercased (CWU) | ✘ |
| Dash (Dash) | ✘ |
| Deprecated (Dep) | ✘ |
| Default Ignorable Code Point (DI) | ✘ |
| Diacritic (Dia) | ✘ |
| East Asian Width (ea) | Neutral |
| Extender (Ext) | ✘ |
| FC NFKC Closure (FC_NFKC) |
0006 |
| Grapheme Cluster Break (GCB) | Control |
| Grapheme Base (Gr_Base) | ✘ |
| Grapheme Extend (Gr_Ext) | ✘ |
| Grapheme Link (Gr_Link) | ✘ |
| Hex Digit (Hex) | ✘ |
| Hangul Syllable Type (hst) | Not Applicable |
| Hyphen (Hyphen) | ✘ |
| ID Continue (IDC) | ✘ |
| Ideographic (Ideo) | ✘ |
| ID Start (IDS) | ✘ |
| IDS Binary Operator (IDSB) | ✘ |
| IDS Trinary Operator and (IDST) | ✘ |
| Indic Matra Category (InMC) | NA |
| Indic Syllabic Category (InSC) | Other |
| ISO 10646 Comment (isc) | — |
| Joining Group (jg) | No_Joining_Group |
| Join Control (Join_C) | ✘ |
| Jamo Short Name (JSN) | — |
| Joining Type (jt) | Non Joining |
| Line Break (lb) | Combining Mark |
| Logical Order Exception (LOE) | ✘ |
| Math (Math) | ✘ |
| Noncharacter Code Point (NChar) | ✘ |
| NFC Quick Check (NFC_QC) | Yes |
| NFD Quick Check (NFD_QC) | Yes |
| NFKC Casefold (NFKC_CF) |
0006 |
| NFKC Quick Check (NFKC_QC) | Yes |
| NFKD Quick Check (NFKD_QC) | Yes |
| Numeric Type (nt) | None |
| Numeric Value (nv) | NaN |
| Other Alphabetic (OAlpha) | ✘ |
| Other Default Ignorable Code Point (ODI) | ✘ |
| Other Grapheme Extend (OGr_Ext) | ✘ |
| Other ID Continue (OIDC) | ✘ |
| Other ID Start (OIDS) | ✘ |
| Other Lowercase (OLower) | ✘ |
| Other Math (OMath) | ✘ |
| Other Uppercase (OUpper) | ✘ |
| Pattern Syntax (Pat_Syn) | ✘ |
| Pattern White Space (Pat_WS) | ✘ |
| Quotation Mark (QMark) | ✘ |
| Radical (Radical) | ✘ |
| Sentence Break (SB) | Other |
| Simple Case Folding (scf) |
0006 |
| Script Extension (scx) | Common |
| Soft Dotted (SD) | ✘ |
| STerm (STerm) | ✘ |
| Terminal Punctuation (Term) | ✘ |
| Unified Ideograph (UIdeo) | ✘ |
| Variation Selector (VS) | ✘ |
| Word Break (WB) | Other |
| White Space (WSpace) | ✘ |
| XID Continue (XIDC) | ✘ |
| XID Start (XIDS) | ✘ |
| Expands On NFC (XO_NFC) | ✘ |
| Expands On NFD (XO_NFD) | ✘ |
| Expands On NFKC (XO_NFKC) | ✘ |
| Expands On NFKD (XO_NFKD) | ✘ |