SWGDRUG Infrared Spectral Library:
SWGDRUG has compiled an infrared spectral library that is available for download from this website. The Drug Enforcement Administration's Special Testing and Research Laboratory generated the following library using structurally confirmed reference materials.

For updates on when the library is updated, follow us on X (formerly known as Twitter). Follow @swgdrug

The SWGDRUG library is provided in the following formats. Click on the appropriate link below to download the compressed file.

Autodata 3.48 -

There is a certain charm to the interface. It is utilitarian. It doesn't require a high-speed internet connection because it runs locally on your hard drive. It doesn't bombard you with ads for other products. You click the car, you click the system, and you get the info.

In an age where diagnostic software requires a monthly subscription that costs as much as a car payment, the idea of a one-time installation is incredibly appealing to the home mechanic (DIYer). autodata 3.48

A searchable database of over 10,000 diagnostic trouble codes. Each code comes with: There is a certain charm to the interface

If you need something newer or cannot find a legitimate copy, consider these alternatives: It doesn't bombard you with ads for other products

| Software | Coverage | Offline? | Price | |----------|----------|----------|-------| | ALLDATA Repair | 1982–present | No (online subscription) | $1,000/year | | Mitchell 1 DIY | 2000–present | No | $30/month | | eManualOnline | Varies by manual | Yes (PDF) | $20–$50 one-time | | ProDemand | 1980–present | Limited offline mode | $800/year | | TechConsults (free) | 1998–2008 | Yes (community-driven) | Free |

None of these perfectly match Autodata 3.48’s combination of low cost, offline access, and professional-grade wiring diagrams—which is exactly why demand for 3.48 persists.

Important: Autodata 3.48 is no longer sold officially by the company. It is considered abandonware in some circles, but you should always respect copyright laws. This section is for educational purposes only.