List of Articles Abacus Open Access Article Abstract Page Full-Text 1 - Evaluation of suitable geometric characteristics of recreant steel core in non buckling CBF bracing Alireza faroughi morteza yarmohammadtouski Open Access Article Abstract Page Full-Text 2 - Analysis of FGM Beam by FEM Method Applying Abacus Software mehdi ghohyeei Seyed Alireza Mohajerani Saeed Jafari Mehr Abadi behnaz ghohyeei Open Access Article Abstract Page Full-Text 3 - The Effect of Abacus Mental Arithmetic Training on Mathematical Problem Solving Skills of the Primary School Students Mana Bazzazi Lemraski Ramezan Jahanian Parisa Irannejad Open Access Article Abstract Page Full-Text 4 - Comparison of working memory and processing speed in male and female students with and without UCMAS mental abacus training Kobra Asghari Abdorrahim Kasaei Esfahani