SiO2, P2O5, B2O3, and Al2O3 are all well-known network formers in oxide glasses, but the structure and properties of mixed Al2O3-B2O3-P2O5-SiO2 glasses without the presence of network modifiers are poorly understood.Some of these glasses exhibit low values of elastic moduli and Poissons ratio compared to traditional oxide glasses with network modifiers.