HP Compaq offers three different lines of business desktop PCs . The 2000 series, the 5000 series and the d500 series all satisfy different market segments. Merkem primarily sells the d500 series of business class machines. These models come in three different configurations. The minitower, small form factor, and ultra slim form factor computers all satisfy different needs. All d500 PCs come with Pentium 4 processors and offer scalability. To learn more about these models or to see pictures, click here.