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<concept id="GUID-B51A9A1F-8E80-4DF6-904A-7BD1A8976BBB" xml:lang="en"><title><ph>Symbian Developer

Library for Product Developers</ph></title><shortdesc><ph>Welcome to the Developer Library

for Symbian^3.</ph><ph>This library

is intended for C++ developers creating devices and writing applications

for Symbian^3.</ph></shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<p/>

<table id="GUID-709B1F4B-5504-41EA-B659-8F2B6810A700">

<tgroup cols="2"><colspec colname="col1"/><colspec colname="col2"/>

<thead>

<row>

<entry>Begin here</entry>

<entry>Application and Middleware Layers</entry>

</row>

</thead>

<tbody>

<row>

<entry><p>These sections provide some starting points for using the

library and the platform.</p><p><xref href="GUID-00113601-193D-5214-9DFB-1C67456B7039.dita">About this Library</xref></p> <p><xref href="GUID-190478E6-E614-4386-9431-15672FDB88D4.dita">About

Symbian^3</xref></p><p><xref href="GUID-35D7EEFC-B2E4-5444-8875-2A24790E08C2.dita">Essential idioms</xref></p> <p><xref href="GUID-270C96B0-4BDF-5A18-A8FE-FA4F78BB34EE.dita">Example

programs</xref></p><p/><p/><p><xref href="GUID-301E5FAA-A1C3-4FD7-9D84-DAA61C66981B.dita">Symbian C++ Quick Start</xref></p><p><xref href="GUID-0C814ED6-3F64-4E0E-9C47-654AEDADBA90.dita">Going Beyond Hello: A Tutorial for

Symbian C++ Applications</xref></p></entry>

<entry><p>The Application Layer provides application user interfaces

and application engines.</p><p><xref href="GUID-1A43A45B-80AE-56A0-A94C-64BA75519C67.dita">Messaging Applications</xref></p><p><xref href="GUID-F23BB1F1-CF90-597F-8410-34AB8B567501.dita">PIM</xref></p><p/><p>The Middleware Layer provides application services,

including UI frameworks and high level communications.</p><p><xref href="GUID-772F9CC3-71B3-53F0-9307-91D35B133810.dita">Application Installation</xref></p><p><xref href="GUID-377F7C19-C799-45CE-9ADA-4BB884B422BA.dita">Browsing and downloading</xref></p><p><xref href="GUID-94005A46-B4C6-4A30-A8E8-1B9C2D583D50.dita">Classic UI</xref></p><p><xref href="GUID-58035B49-2EAE-5144-B226-28AF2EDD62E7.dita">Generic Application

Support</xref></p><p><xref href="GUID-4CEB52EC-8F08-53B7-A900-AF163316D442.dita">Messaging Middleware</xref></p><p><xref href="GUID-6425B722-4095-56E3-9198-70BA3E06C617.dita">Multimedia

Protocols</xref></p></entry>

</row>

</tbody>

</tgroup>

<tgroup cols="2"><colspec colname="col1" colwidth="0.58*"/><colspec colname="col2" colwidth="1.42*"/>

<thead>

<row>

<entry>Key APIs</entry>

<entry>OS Layer</entry>

</row>

</thead>

<tbody>

<row>

<entry><p>These are quick links to some APIs that most Symbian C++

programs use.</p><p><xref href="GUID-F6F9B2AC-A47E-5B0B-A1E2-EE2B31B59F2A.dita">Arrays and lists</xref></p> <p><xref href="GUID-FBE448A4-4728-5EE5-84F2-4790735857B3.dita">Basic

types</xref></p> <p><xref href="GUID-E5A83EF3-948B-5729-A2CD-3644E803520B.dita">Cleanup support</xref></p> <p><xref href="GUID-D0D27AEA-FDDB-5F6F-94F6-ADDF5910DC47.dita">Client/server</xref></p> <p><xref href="GUID-0817AD1D-58CF-5108-ACBF-26DFD4BA395E.dita">Descriptors</xref></p></entry>

<entry><p>The OS Layer provides the Symbian Kernel, and frameworks

to support fundamental services.</p><p><xref href="GUID-FA5A24BE-F4AF-5EC3-8969-6184A5A5BBFA.dita">Cellular Baseband Services </xref></p><p/> <p><xref href="GUID-3EF88A1D-CCB6-5DE5-9CA6-F6E785A6898A.dita">Communications Framework </xref></p><p/><p><xref href="GUID-F8C8CE42-E7C9-5AFC-86BC-B78F677F1B05.dita">Device

Services</xref> </p><p><xref href="GUID-E6694EF0-8533-4507-B2A3-49FC2E8F579A.dita">DRM</xref></p><p><xref href="GUID-F6B9860A-E7F2-5B03-878D-9BCA0AF029C2.dita">Generic OS Services</xref></p> <p><xref href="GUID-A51E334E-F410-55A9-AB07-82F8A1D113B4.dita">Graphics</xref></p><p><xref href="GUID-FB248087-B0DC-5C06-AA8E-846474BCD01B.dita">Kernel and Hardware Services</xref></p><p/> <p><xref href="GUID-BA49FDC0-808B-5E05-81AC-98637214F304.dita">Locating Services</xref></p> <p/><p><xref href="GUID-E2252589-DCFB-5272-8FB3-701712D7F417.dita">Multimedia</xref></p><p><xref href="GUID-BC191AA8-696F-51A2-801F-B3F952037F54.dita">OS

Security</xref> </p><p><xref href="GUID-F6460808-A806-5701-983E-CCD92EF3F688.dita">Networking Services</xref></p><p/><p><xref href="GUID-FBCBF8A0-7922-5881-A1C5-5DB41630E75A.dita">Persistent

Data Services</xref></p><p/> <p><xref href="GUID-DD13AA8E-BDAD-57EC-81EC-49C8D6D30A86.dita">Shortlink

Services</xref></p><p><xref href="GUID-1DCA2F4D-ABE6-52A0-AC4E-5AAC1AB5909D.dita">Text and Localization</xref></p><p><xref href="GUID-82AF5F49-EE25-54C7-AEE9-D1F41BD5190F.dita">XML Services</xref></p></entry>

</row>

</tbody>

</tgroup>

<tgroup cols="2"><colspec colname="col1"/><colspec colname="col2"/>

<thead>

<row>

<entry>Expert Programming</entry>

<entry>All Documents</entry>

</row>

</thead>

<tbody>

<row>

<entry><p>These documents help you write better and safer programs.</p><p><xref href="GUID-87D1F36A-A3BB-5385-BDF3-211AC31097E9.dita">Performance considerations</xref></p> <p><xref href="GUID-AB3D07E6-83C9-4948-A13F-75A65498F444.dita">Security</xref></p><p><xref href="GUID-629EAA30-ED77-4CA9-91ED-36C818D7B4F4.dita">SMP</xref></p></entry>

<entry><p>These links take you to full lists of packages and tools

described in the library.</p><p><xref href="GUID-32E29020-1956-461A-B79A-1492E06049E7.dita">Symbian Guide</xref></p><p><xref href="GUID-A34D1674-8BFC-450B-805E-2D1F509F7BCF.dita">API

Specifications</xref></p><p><xref href="GUID-C0498002-7CD9-4B2D-B1F9-FB0908C4C1A5.dita">Reference</xref></p><p><xref href="GUID-A837D8F6-B9D3-5119-8C63-51772B388999.dita">Tools and

Utilities</xref></p></entry>

</row>

</tbody>

</tgroup>