Input/output featuresv 25-pin, ECP/EPP parallel portv One or two 9-pin serial portsv Two 4-pin, USB portsv PS/2 mouse portv PS/2 keyboard portv 15-pin monitor portv Three audio connectors (line/headphone out, line in, and microphone)v Joystick/MIDI connector (some models)Expansionv Small form factor desktop models– Three drive bays– Two peripheral component interconnect (PCI) slots with support for Plugand Play adaptersv Desktop models– Four drive bays– Three PCI expansion slots with support for Plug and Play adapters– One AGP expansion slot (some models; some models with AGP slot comewith a preinstalled AGP adapter)Powerv Small form factor desktop: 110 W power supply with automatic ac voltagesensingv Desktop: 155 W power supply with manual voltage selection switchv Automatic 50/60 Hz input frequency switchingv Built-in overload and surge protectionv Advanced Power Management supportv Advance Configuration and Power Interface (ACPI) supportSecurity featuresv Power-on and administrator passwordsv Cover keylock (some models)v Support for the addition of a U-bolt and lockable cablev Startup sequence controlv Startup without diskette drive, keyboard, or mousev Unattended start modev Diskette and hard disk I/O controlv Serial and parallel port I/O controlv Security profile by deviceIBM preinstalled softwareYour computer might come with preinstalled software. If so, an operatingChapter 1. IBM NetVista computer overview 5