Replication package: defects in open-source point-of-sale (POS) software

Replication package for an empirical study that classifies defect reports sampled from 779 closed bug-labelled GitHub issues in four open-source point-of-sale projects (OpenSourcePOS, OCA/pos, NexoPOS and tailpos), by the product function that failed. Contains the survey and issue-collection scripts, issue metadata (project, number, URL, dates, labels, comment counts), final labels, second-annotator labels with the agreement script, and the classification scheme. Issue texts, comments and user names are not redistributed. The data are a snapshot of GitHub taken on 3 October 2026. Licences: code MIT, data CC BY 4.0.