The Joint Expert Group on a Reconciliation of credit institutions' statistical and supervisory reporting requirements (JEGR) was established in June 2008. Since then, its mandate has been renewed twice, in 2010 and 2012. Its sponsors are the Statistics Committee (STC) and Financial Stability Committee (FSC) of the European System of Central Banks (ESCB), and the European Banking Authority (EBA). Pierre Olivier Cousseran (Banque de France) chaired the JEGR until end-2011. The JEGR's work has been supported by the banking industry. By ensuring that the classification system is maintained on a regular basis, its advantages for the compilers and reporting agents can be fully exploited. The aim of the JEGR is to bridge elements of the statistical and supervisory reporting frameworks relating to credit institutions (definitions, concepts, valuation rules, reporting templates, etc.) and, where possible, identify reconciliation options between them. The JEGR takes into consideration, on the one hand, the framework established by the EBA for the reporting of financial information compliant with international accounting standards (FINREP), capital adequacy data requirements (COREP) and requirements for data on Large Exposures (LE); and, on the other hand, the European Central Bank's (ECB) statistical reporting framework for credit institutions' balance sheet items (BSI) and interest rates (MIR) based on the European System of Accounts (ESA). The JEGR is aware that the reporting frameworks (in particular FINREP, COREP and LE) will soon be amended again, and in fact the present manual takes into account the latest versions of FINREP, COREP and LE. The JEGR has developed a classification system comprising the following two elements: 1) a methodological bridging manual containing a thorough analysis of the areas of potential overlap between the ECB's statistical reporting requirements and selected supervisory requirements addressed to credit institutions; and 2) a relational database which mirrors the bridging manual, aiming to systematically identify possible links (commonalities and differences) between these requirements. The ECB and the EBA published a first version of the classification system in February 2010. The new edition published on 23rd March 2012 includes further enhancements and updates. It also includes a series of reconciliation proposals which are in the process of being implemented by the ECB and the EBA. These proposals have a general impact on the BSI, MIR, FINREP, COREP and LE frameworks, bringing closer together important aspects such as instrument definitions and classification, sector classification, and consolidation and accounting rules. This pocket version of the methodological manual provides a brief overview of the differences and commonalities between the ECB's statistical framework and the EBA's supervisory framework (Chapter 1). It also presents some examples of the bridging work that has been done by the JEGR (Chapter 2) and the main features of the relational database (Chapter 3), including some screenshots in an annex.