Abstract: A portable telephone unit 10 receives management information comprising size information for contents data wanting to be downloaded, and adjusts an environment for receiving the object data, based on size information for contents data contained in the management information. To adjust the environment for receiving the object data it is possible, for example, to determine a communication system for receipt, or to secure a storage region for storing object data that has been received. After that, the portable telephone unit 10 transmits a contents data download request, and receives contents data returned in response to the download request. As a result, it is possible for the communication terminal to download the contents data in a state where the receive environment has been optimized according to the size of the contents.

Abstract: A cellular phone 10 transmits a request for management information including size information of object data which is desired to be downloaded, and determines whether a size of the object data exceeds a predetermined value or not, based on the size information. If the size of the object data does not exceed the predetermined value, the cellular phone 10 stores the object data, received in response to the download request, in a temporary storage area. If the size of the object data does exceed the predetermined value, the cellular phone 10 determines whether a free area for storing the object data in a permanent storage area exists or not. If a free area exists, the object data received in response to the download request is stored in the permanent storage area.

Abstract: A cellular phone 10 transmits management information including size information of object data desirably downloaded, and determines whether a size of the object data exceeds the second predetermined value or not, based on the size information. If the result is negative, the cellular phone 10 stores the object data, sent back responding to download request, in a temporary storage area. If the result is affirmative, the cellular phone 10 determines whether a free area for storing the object data in a permanent storage area exists or not. If the result is affirmative, the object data sent back responding to the downloading request is stored in the permanent storage area. As a result, the temporary storage area to be used for storing history is not used any more for storing a large amount of content data, and number of histories held in the temporary storage area can be guaranteed.

Abstract: A portable telephone unit 10 receives management information comprising size information for contents data wanting to be downloaded, and adjusts an environment for receiving the object data, based on size information for contents data contained in the management information. To adjust the environment for receiving the object data it is possible, for example, to determine a communication system for receipt, or to secure a storage region for storing object data that has been received. After that, the portable telephone unit 10 transmits a contents data download request, and receives contents data returned in response to the download request. As a result, it is possible for the communication terminal to download the contents data in a state where the receive environment has been optimized according to the size of the contents.

Abstract: A flame-retardant resin composition comprising:(a) a copolymer obtained by copolymerizing from 65 to 80% by weight of .alpha.-methylstyrene, from 15 to 30% by weight of acrylonitrile and from 0 to 30% by weight of a monomer copolymerizable therewith and having a number average molecular weight of from 15,000 to 80,000;(b) a graft copolymer obtained by copolymerizing from 20 to 70 parts by weight of a monomer mixture of from 50 to 80% by weight of styrene, from 15 to 35% by weight of acrylonitrile and from 0 to 30% by weight of other vinyl compound copolymerizable therewith in the presence of from 30 to 80 parts by weight of a rubber having a glass transition temperature of not higher than 0.degree. C.

Abstract: A thermoplastic resin composition well balanced among heat resistance, high-impact properties and moldability is provided, which composition comprises 50 to 90 parts by weight of a random copolymer (A) composed mainly of .alpha.-methylstyrene units and acrylonitrile units, 0.2 to 1.0 part by weight based on 100 parts by weight of the random copolymer (A), of an oligomer (B) composed mainly of .alpha.-methylstyrene units and acrylonitrile units and having a molecular weight of 200 to 500 and 10 to 50 parts by weight of a dienic rubber-aromatic vinyl monomer-vinyl cyanide graft copolymer (C).

Abstract: An aromatic polymer is prepared by polymerizing a diphenolate compound, of a dialkali metal salt of a diphenol with a dihalodiphenyl compound, of a dihalogenobenzenoid compound having an electron withdrawing group in at least one of the positions ortho or para to each of the halogen atoms, at 200.degree. C. to 400.degree. C. in the presence of from 0.1 to 30% by weight of an inert nonpolar aromatic reaction lubricant.