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File extension
Category Document File
Description Files with a file extension are spreadsheet documents which are generated by Apple's "Numbers" application in version 1.0 (this version of the software were released in August 2007). Technically speaking the files produced are packages, but since it is not possible to upload a package to a web service (as they are multiple files) Zamzar recommends compressing them into a ZIP file before upload.

The format is distinct from the numbers file produced by more modern versions of iWork which is a single file (and so does not need to be compressed).

Numbers is one of 3 programs which make up Apple's iWork office suite, a set of applications which run on the Mac OS X and iOS operating systems, also including Pages (for word processing) and Keynote (for presentations).

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Technical Details Official file format specifications for iWork '05-'08 Numbers files are not published by Apple but there have been attempts by some developers to reverse engineer them.

Files created by Numbers in iWork '05 - '08 are not compatibile with the most recent versions of iWork. In general Numbers files cannot be opened by programs other than iWork.

Associated programs Apple iWork '05
Apple iWork '08
Numbers 1.0
Developed by Apple Inc
MIME type application/x-iwork-numbers-sffnumbers
Useful links iWork 05 programming guide
Numbers details on Wikipedia
Information on iWork Numbers mime formats
More information from Apple on iWork
Convert NUMBERS.ZIP file
File extension .csv
Category Document File
Description A CSV file is a way to collect the data from any table so that it can be conveyed as input to another table-oriented application such as a relational database application. Microsoft Excel, a leading spreadsheet or relational database application, can read CSV files. A CSV file is sometimes referred to as a flat file.
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Technical Details In computers, a CSV file contains the different values in a table as a series of ASCII (American Standard Code for Information Interchange) text lines which are then organised so that each column value is separated by a comma from the next columns value and each row starts a new line. CSV is one example of a delimited text file, which uses a comma to separate values (many other implementations of CSV allow different seperators such as back or forward slash to be used). However CSV differs from other delimiter separated file formats in using a double quote character around fields that contain reserved characters (such as commas or newlines). The benefit of this approach is that it allows the transfer of data across different applications.
Associated programs The CSV file format is very simple and supported by almost all spreadsheets and database management systems
Developed by Microsoft
MIME type text/comma-separated-values
Useful links More detailed information on CSV files
How to use CSV files
Programs that open CSV files
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Convert NUMBERS.ZIP file

Using Zamzar it is possible to convert NUMBERS.ZIP files to a variety of other formats

  • to csv (Comma Separated Values)
  • to numbers09 (Apple iWork '09 Numbers Spreadsheet)
  • to pdf (Portable Document Format)
  • to xls (Microsoft Excel Spreadsheet)
  • to xlsx (Microsoft Excel 2007 Spreadsheet)

NUMBERS.ZIP to CSV - Convert file now