The most recognized output from NTSYS-PC is the Dendrogram. The software allows researchers to input raw data matrices, calculate similarity coefficients (such as Jaccard or Dice coefficients), and perform clustering algorithms like UPGMA (Unweighted Pair Group Method with Arithmetic Mean). The resulting tree structures visually represent how closely related different samples are.
If you have old NTSYS files (.nts, .dat, .tre), consider future-proofing them:
A typical session in NTSYS-PC 2.02 for analyzing genetic data follows a logical flow: ntsys pc 2.02 software
Countless peer-reviewed papers published between 1990 and 2005 explicitly cite “NTSYS-pc version 2.02.” If a researcher wants to re-analyze an old dataset exactly as it was originally processed—without rounding errors from newer algorithms—they need the same software.
Given that free tools like PAST, R (with vegan and ape), and Python (with scikit-learn and SciPy) exist, why would a scientist in 2025 seek out NTSYS pc 2.02 software? The most recognized output from NTSYS-PC is the Dendrogram
Option A: Used / Archive Purchase
Some university surplus stores or eBay listings occasionally include original floppy disks or CD-ROMs with licenses. If you find a physical copy with a manual and a license key (often printed on the inside cover or a card), you are legally entitled to run it.
Option B: Institutional Archives
If you work at a university that purchased a site license for NTSYS between 1995 and 2005, their IT department or library archive may still have the installation media. Ask for the “legacy software repository.” A typical session in NTSYS-PC 2
Option C: Contact the Successor (Exeter Software)
Exeter Software (exetersoftware.com) once distributed NTSYS. While they no longer sell version 2.02, they may provide legacy installers to verified academic researchers for historical reproducibility projects. It is always worth sending a polite inquiry.
Warning: Avoid random “abandonware” websites that host cracked copies. These often contain malware packaged with the installer. Given the software’s age, the risk is high.