Keeping up with the latest desktop computer technology is an uphill battle. Just when you thought you were the proud owner of the hottest equipment, a faster, more powerful model is introduced. Once again, it's time to upgrade. Then comes the inevitable question - what do you do with your current machine?

Recycling efforts have been on the rise due to consumers' constant upgrading. Since cathode-ray tubes contain about four to six pounds of lead, however, landfills become toxic dumps if computers are left there to decay.

So here are some hints on what you can do with your computers when it's time to "shut down" for good.

• Ask about rebates. If you just want an updated model, ask the manufacturer if they have a trade-in program. For example, with the new Gateway YourWare recycling program, you can get a rebate of up to $50 if you purchase a new PC and recycle your old one.
• IBM PC Recycling Service. They recycle any manufacturer's PCs for $29.99, which includes shipping. Customers box the system and ship it to Envirocycle - a designated recycling center. Depending on the age and performance capability of the computer, IBM will either recycle the equipment, reusing or recycling as many of the parts and materials as possible, or refurbish the system and donate it to Gifts in Kind International (GIKI).
• National Cristina Foundation. This foundation, www.cristina.org, is a not-for-profit organization that donates computer technology to people with disabilities, students at risk, and economically disadvantaged people worldwide. Once you submit the information about your donation, the foundation then finds someone whose needs match your donation. And as an added bonus, it's tax deductible.
• Grassroots Recycling Network. Their site, www.grrn.org, provides information, as well links, for various recycling programs.
• Share the Technology. This nonprofit corporation has developed the National Computer Donation Database, which lists charities, schools, and nonprofits in need. You can browse through postings on their Web site, www.sharetechnology.org, to find the perfect match for your donation. Again, since this is a charitable organization, it's tax deductible.
• National Recycling Coalition. They provide information about electronics recycling. If you're looking to recycle CD-ROMs, floppy disks, and printer cartridges, check out www.nrc-recycle.org.
• PEP National directory of recycling centers. The PEP site, http://www.microweb.com, was launched as an informational resource for Parents, Educators, and children's software Publishers. The site lists various national computer recycling programs that target different groups in need.

Instead of letting your old machine sit in a storage closet collecting dust, explore one of these options to extend the life of your computer. Manufacturers have the means to dispose of the various electrical components in a way that's better for the environment, and donations are always a worthwhile alternative. After all, your old machine could be someone else's upgrade.