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<dt><b>PPD</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#PPD-GLOSSARY">PostScript Printer
Description</a></p>
</dd>

<dt><b>PPP</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#PPP-GLOSSARY">Point-to-Point
Protocol</a></p>
</dd>

<dt><b>PPPoA</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#PPPOA-GLOSSARY"><acronym
class="ACRONYM">PPP</acronym> over <acronym class="ACRONYM">ATM</acronym></a></p>
</dd>

<dt><b>PPPoE</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#PPPOE-GLOSSARY"><acronym
class="ACRONYM">PPP</acronym> over <acronym class="ACRONYM">Ethernet</acronym></a></p>
</dd>

<dt><a id="PPPOA-GLOSSARY" name="PPPOA-GLOSSARY"></a><b><acronym
class="ACRONYM">PPP</acronym> over <acronym class="ACRONYM">ATM</acronym></b></dt>

<dt>(PPPoA)</dt>

<dt><a id="PPPOE-GLOSSARY" name="PPPOE-GLOSSARY"></a><b><acronym
class="ACRONYM">PPP</acronym> over <acronym class="ACRONYM">Ethernet</acronym></b></dt>

<dt>(PPPoE)</dt>

<dt><b>PR</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#PR-GLOSSARY">Problem Report</a></p>
</dd>

<dt><b>PXE</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#PXE-GLOSSARY">Preboot eXecution
Environment</a></p>
</dd>

<dt><a id="PAP-GLOSSARY" name="PAP-GLOSSARY"></a><b>Password Authentication
Protocol</b></dt>

<dt>(PAP)</dt>

<dt><a id="PC-GLOSSARY" name="PC-GLOSSARY"></a><b>Personal Computer</b></dt>

<dt>(PC)</dt>

<dt><a id="PCNFSD-GLOSSARY" name="PCNFSD-GLOSSARY"></a><b>Personal Computer Network File
System Daemon</b></dt>

<dt>(PCNFSD)</dt>

<dt><a id="PAE-GLOSSARY" name="PAE-GLOSSARY"></a><b>Physical Address Extensions</b></dt>

<dt>(PAE)</dt>

<dd>
<p>A method of enabling access to up to 64 GB of <acronym class="ACRONYM">RAM</acronym>
on systems which only physically have a 32-bit wide address space (and would therefore be
limited to 4 GB without PAE).</p>
</dd>

<dt><a id="PAM-GLOSSARY" name="PAM-GLOSSARY"></a><b>Pluggable Authentication
Modules</b></dt>

<dt>(PAM)</dt>

<dt><a id="PPP-GLOSSARY" name="PPP-GLOSSARY"></a><b>Point-to-Point Protocol</b></dt>

<dt>(PPP)</dt>

<dt><a id="POINTYHAT" name="POINTYHAT"></a><b>Pointy Hat</b></dt>

<dd>
<p>A mythical piece of headgear, much like a <var class="LITERAL">dunce cap</var>,
awarded to any FreeBSD committer who breaks the build, makes revision numbers go
backwards, or creates any other kind of havoc in the source base. Any committer worth his
or her salt will soon accumulate a large collection. The usage is (almost always?)
humorous.</p>
</dd>

<dt><a id="PDF-GLOSSARY" name="PDF-GLOSSARY"></a><b>Portable Document Format</b></dt>

<dt>(PDF)</dt>

<dt><a id="POP-GLOSSARY" name="POP-GLOSSARY"></a><b>Post Office Protocol</b></dt>

<dt>(POP)</dt>

<dt><a id="POP3-GLOSSARY" name="POP3-GLOSSARY"></a><b>Post Office Protocol Version
3</b></dt>

<dt>(POP3)</dt>

<dt><a id="PPD-GLOSSARY" name="PPD-GLOSSARY"></a><b>PostScript Printer
Description</b></dt>

<dt>(PPD)</dt>

<dt><a id="PXE-GLOSSARY" name="PXE-GLOSSARY"></a><b>Preboot eXecution
Environment</b></dt>

<dt>(PXE)</dt>

<dt><a id="POLA-GLOSSARY" name="POLA-GLOSSARY"></a><b>Principle Of Least
Astonishment</b></dt>

<dt>(POLA)</dt>

<dd>
<p>As FreeBSD evolves, changes visible to the user should be kept as unsurprising as
possible. For example, arbitrarily rearranging system startup variables in <tt
class="FILENAME">/etc/defaults/rc.conf</tt> violates <acronym
class="ACRONYM">POLA</acronym>. Developers consider <acronym
class="ACRONYM">POLA</acronym> when contemplating user-visible system changes.</p>
</dd>

<dt><a id="PR-GLOSSARY" name="PR-GLOSSARY"></a><b>Problem Report</b></dt>

<dt>(PR)</dt>

<dt><a id="PID-GLOSSARY" name="PID-GLOSSARY"></a><b>Process ID</b></dt>

<dt>(PID)</dt>

<dd>
<p>A number, unique to a particular process on a system, which identifies it and allows
actions to be taken against it.</p>
</dd>

<dt><a id="PROJECTEVIL-GLOSSARY" name="PROJECTEVIL-GLOSSARY"></a><b>Project Evil</b></dt>

<dd>
<p>The working title for the <acronym class="ACRONYM">NDISulator</acronym>, written by
Bill Paul, who named it referring to how awful it is (from a philosophical standpoint) to
need to have something like this in the first place. The <acronym
class="ACRONYM">NDISulator</acronym> is a special compatibility module to allow Microsoft
Windows&trade; NDIS miniport network drivers to be used with FreeBSD/i386. This is
usually the only way to use cards where the driver is closed-source. See <tt
class="FILENAME">src/sys/compat/ndis/subr_ndis.c</tt>.</p>
</dd>
</dl>
</div>

<div class="GLOSSDIV">
<h1 class="GLOSSDIV"><a id="AEN45056" name="AEN45056">R</a></h1>

<dl>
<dt><b>RA</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RA-GLOSSARY">Router Advertisement</a></p>
</dd>

<dt><b>RAID</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RAID-GLOSSARY">Redundant Array of
Inexpensive Disks</a></p>
</dd>

<dt><b>RAM</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RAM-GLOSSARY">Random Access
Memory</a></p>
</dd>

<dt><b>RD</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RD-GLOSSARY">Received Data</a></p>
</dd>

<dt><b>RFC</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RFC-GLOSSARY">Request For
Comments</a></p>
</dd>

<dt><b>RISC</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RISC-GLOSSARY">Reduced Instruction Set
Computer</a></p>
</dd>

<dt><b>RPC</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RPC-GLOSSARY">Remote Procedure
Call</a></p>
</dd>

<dt><b>RS232C</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RS232C-GLOSSARY">Recommended Standard
232C</a></p>
</dd>

<dt><b>RTS</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#RTS-GLOSSARY">Request To Send</a></p>
</dd>

<dt><a id="RAM-GLOSSARY" name="RAM-GLOSSARY"></a><b>Random Access Memory</b></dt>

<dt>(RAM)</dt>

<dt><a id="RD-GLOSSARY" name="RD-GLOSSARY"></a><b>Received Data</b></dt>

<dt>(RD)</dt>

<dt><a id="RS232C-GLOSSARY" name="RS232C-GLOSSARY"></a><b>Recommended Standard
232C</b></dt>

<dt>(RS232C)</dt>

<dd>
<p>A standard for communications between serial devices.</p>
</dd>

<dt><a id="RISC-GLOSSARY" name="RISC-GLOSSARY"></a><b>Reduced Instruction Set
Computer</b></dt>

<dt>(RISC)</dt>

<dt><a id="RAID-GLOSSARY" name="RAID-GLOSSARY"></a><b>Redundant Array of Inexpensive
Disks</b></dt>

<dt>(RAID)</dt>

<dt><a id="RPC-GLOSSARY" name="RPC-GLOSSARY"></a><b>Remote Procedure Call</b></dt>

<dt>(RPC)</dt>

<dt><a id="RFC-GLOSSARY" name="RFC-GLOSSARY"></a><b>Request For Comments</b></dt>

<dt>(RFC)</dt>

<dt><a id="RTS-GLOSSARY" name="RTS-GLOSSARY"></a><b>Request To Send</b></dt>

<dt>(RTS)</dt>

<dt><a id="RA-GLOSSARY" name="RA-GLOSSARY"></a><b>Router Advertisement</b></dt>

<dt>(RA)</dt>
</dl>
</div>

<div class="GLOSSDIV">
<h1 class="GLOSSDIV"><a id="AEN45130" name="AEN45130">S</a></h1>

<dl>
<dt><b>SCI</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SCI-GLOSSARY">System Control
Interrupt</a></p>
</dd>

<dt><b>SCSI</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SCSI-GLOSSARY">Small Computer System
Interface</a></p>
</dd>

<dt><b>SG</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SG-GLOSSARY">Signal Ground</a></p>
</dd>

<dt><b>SMB</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SMB-GLOSSARY">Server Message
Block</a></p>
</dd>

<dt><b>SMP</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SMP-GLOSSARY">Symmetric
MultiProcessor</a></p>
</dd>

<dt><b>SMTP</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SMTP-GLOSSARY">Simple Mail Transfer
Protocol</a></p>
</dd>

<dt><b>SMTP AUTH</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SMTPAUTH-GLOSSARY"><acronym
class="ACRONYM">SMTP</acronym> Authentication</a></p>
</dd>

<dt><b>SSH</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#SSH-GLOSSARY">Secure Shell</a></p>
</dd>

<dt><b>STR</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#STR-GLOSSARY">Suspend To <acronym
class="ACRONYM">RAM</acronym></a></p>
</dd>

<dt><a id="SMTPAUTH-GLOSSARY" name="SMTPAUTH-GLOSSARY"></a><b><acronym
class="ACRONYM">SMTP</acronym> Authentication</b></dt>

<dt>(SMTP AUTH)</dt>

<dt><a id="SMB-GLOSSARY" name="SMB-GLOSSARY"></a><b>Server Message Block</b></dt>

<dt>(SMB)</dt>

<dt><a id="SG-GLOSSARY" name="SG-GLOSSARY"></a><b>Signal Ground</b></dt>

<dt>(SG)</dt>

<dd>
<p>An RS232 pin or wire that is the ground reference for the signal.</p>
</dd>

<dt><a id="SMTP-GLOSSARY" name="SMTP-GLOSSARY"></a><b>Simple Mail Transfer
Protocol</b></dt>

<dt>(SMTP)</dt>

<dt><a id="SSH-GLOSSARY" name="SSH-GLOSSARY"></a><b>Secure Shell</b></dt>

<dt>(SSH)</dt>

<dt><a id="SCSI-GLOSSARY" name="SCSI-GLOSSARY"></a><b>Small Computer System
Interface</b></dt>

<dt>(SCSI)</dt>

<dt><a id="STR-GLOSSARY" name="STR-GLOSSARY"></a><b>Suspend To <acronym
class="ACRONYM">RAM</acronym></b></dt>

<dt>(STR)</dt>

<dt><a id="SMP-GLOSSARY" name="SMP-GLOSSARY"></a><b>Symmetric MultiProcessor</b></dt>

<dt>(SMP)</dt>

<dt><a id="SCI-GLOSSARY" name="SCI-GLOSSARY"></a><b>System Control Interrupt</b></dt>

<dt>(SCI)</dt>
</dl>
</div>

<div class="GLOSSDIV">
<h1 class="GLOSSDIV"><a id="AEN45206" name="AEN45206">T</a></h1>

<dl>
<dt><b>TCP</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#TCP-GLOSSARY">Transmission Control
Protocol</a></p>
</dd>

<dt><b>TD</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#TD-GLOSSARY">Transmitted Data</a></p>
</dd>

<dt><b>TFTP</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#TFTP-GLOSSARY">Trivial <acronym
class="ACRONYM">FTP</acronym></a></p>
</dd>

<dt><b>TGT</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#TGT-GLOSSARY">Ticket-Granting
Ticket</a></p>
</dd>

<dt><b>TSC</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#TSC-GLOSSARY">Time Stamp Counter</a></p>
</dd>

<dt><a id="TGT-GLOSSARY" name="TGT-GLOSSARY"></a><b>Ticket-Granting Ticket</b></dt>

<dt>(TGT)</dt>

<dt><a id="TSC-GLOSSARY" name="TSC-GLOSSARY"></a><b>Time Stamp Counter</b></dt>

<dt>(TSC)</dt>

<dd>
<p>A profiling counter internal to modern <span class="TRADEMARK">Pentium</span>&reg;
processors that counts core frequency clock ticks.</p>
</dd>

<dt><a id="TCP-GLOSSARY" name="TCP-GLOSSARY"></a><b>Transmission Control
Protocol</b></dt>

<dt>(TCP)</dt>

<dt><a id="TD-GLOSSARY" name="TD-GLOSSARY"></a><b>Transmitted Data</b></dt>

<dt>(TD)</dt>

<dt><a id="TFTP-GLOSSARY" name="TFTP-GLOSSARY"></a><b>Trivial <acronym
class="ACRONYM">FTP</acronym></b></dt>

<dt>(TFTP)</dt>
</dl>
</div>

<div class="GLOSSDIV">
<h1 class="GLOSSDIV"><a id="AEN45250" name="AEN45250">U</a></h1>

<dl>
<dt><b>UDP</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#UDP-GLOSSARY">User Datagram
Protocol</a></p>
</dd>

<dt><b>UFS1</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#UFS1-GLOSSARY">Unix File System Version
1</a></p>
</dd>

<dt><b>UFS2</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#UFS2-GLOSSARY">Unix File System Version
2</a></p>
</dd>

<dt><b>UID</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#UID-GLOSSARY">User ID</a></p>
</dd>

<dt><b>URL</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#URL-GLOSSARY">Uniform Resource
Locator</a></p>
</dd>

<dt><b>USB</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#USB-GLOSSARY">Universal Serial
Bus</a></p>
</dd>

<dt><a id="URL-GLOSSARY" name="URL-GLOSSARY"></a><b>Uniform Resource Locator</b></dt>

<dt>(URL)</dt>

<dt><a id="UFS1-GLOSSARY" name="UFS1-GLOSSARY"></a><b>Unix File System Version 1</b></dt>

<dt>(UFS1)</dt>

<dt><a id="UFS2-GLOSSARY" name="UFS2-GLOSSARY"></a><b>Unix File System Version 2</b></dt>

<dt>(UFS2)</dt>

<dt><a id="USB-GLOSSARY" name="USB-GLOSSARY"></a><b>Universal Serial Bus</b></dt>

<dt>(USB)</dt>

<dt><a id="UID-GLOSSARY" name="UID-GLOSSARY"></a><b>User ID</b></dt>

<dt>(UID)</dt>

<dd>
<p>A unique number assigned to each user of a computer, by which the resources and
permissions assigned to that user can be identified.</p>
</dd>

<dt><a id="UDP-GLOSSARY" name="UDP-GLOSSARY"></a><b>User Datagram Protocol</b></dt>

<dt>(UDP)</dt>
</dl>
</div>

<div class="GLOSSDIV">
<h1 class="GLOSSDIV"><a id="AEN45300" name="AEN45300">V</a></h1>

<dl>
<dt><b>VPN</b></dt>

<dd>
<p><em>See:</em> <a href="freebsd-glossary.html#VPN-GLOSSARY">Virtual Private
Network</a></p>
</dd>

<dt><a id="VPN-GLOSSARY" name="VPN-GLOSSARY"></a><b>Virtual Private Network</b></dt>

<dt>(VPN)</dt>
</dl>
</div>
</div>

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<p align="center"><small>This, and other documents, can be downloaded from <a
href="ftp://ftp.FreeBSD.org/pub/FreeBSD/doc/">ftp://ftp.FreeBSD.org/pub/FreeBSD/doc/</a>.</small></p>

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