in the description herein , a preferred embodiment of the invention is described , including preferred process steps and data structures . those skilled in the art would realize , after perusal of this application , that embodiments of the invention might be implemented using a variety of other techniques not specifically described , without undue experimentation or further invention , and that such other techniques would be within the scope and spirit of the invention . the general meaning of each of these following terms is intended to be illustrative and in no way limiting . the phrases “ media stream ”, and the like , describe information intended for presentation in a sequence , such as motion pictures including a sequence of frames or fields , or such as audio including a sequence of sounds . as used herein , the phrase “ media stream ” has a broader meaning than the standard meaning for “ streaming media ,” ( of sound and pictures that are transmitted continuously using packets and that start to play before all of the content arrives ). rather , as described herein , there is no particular requirement that “ media streams ” must be delivered continuously . also as described herein , media streams can refer to other information for presentation , such as for example animation or sound , as well as to still media , such as for example pictures or illustrations , and also to databases and other collections of information . the phrases “ digital content ”, and the like , describe data in a digital format , intended to represent media streams or other information for presentation to an end viewer . “ digital content ” is distinguished from packaging information ; such as for example message header information . for the two phrases “ digital content ” and “ media stream ,” the former describes a selected encoding of the latter , while the latter describes a result of presenting any encoding thereof . the term “ dvd ”, the phrase “ digital versatile disc ”, and the like , describe a technology standard capable of storing data . the phrases “ digital media ,” and the like , describe physical media capable of maintaining digital content in an accessible form . digital media includes disk drives ( including magnetic , optical , or magneto - optical disk drives ), as well as any other physical media capable of maintaining information , such as digital content . the phrases “ dvd media content format ,” and the like , describe a family of encoding formats including dvd - audio and dvd - video ( such as for example used with media including digital video disks or equivalents thereof ). dvd media content format is a specific example of one of many possible formats in which digital content might be encoded . the phrases “ digital media ,” and the like , describe physical media capable of maintaining digital content in an accessible form . digital media includes disk drives ( including magnetic , optical , or magneto - optical disk drives ), as well as any other physical media capable of maintaining information , such as digital content . the terms “ playback ,” “ presentation ,” and the like , describe presentation ( such as for example to one or more users ) of audio , visual , or other features of media streams . the phrase “ content server ”, and the like , describe devices ( or portions thereof , or sets of such devices or portions thereof ) capable of sending digital content to recipients . for example , a content server might include a web server at which a user is provided the capability of purchasing digital media for download . in the context of the invention , there is no particular requirement that the server be ( logically or physically ) located at any particular address or place , or have any particular architecture , or use any particular protocol for communication . for example , the content server might include a process logically available to a local presentation device . the scope and spirit of the invention is not limited to any of these definitions , or to specific examples mentioned therein , but is intended to include the most general concepts embodied by these and other terms . fig1 shows a block diagram of a system capable of facilitating user interaction with a computing device such as a server device . a system 100 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least a server device 110 , a local library 120 , at least one client device 130 , and a user 140 . the server device 110 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . in one embodiment , these elements include at least a media object database 111 , a communication link 112 , and optionally a set of digital content 113 ( or at least the capability for accessing digital content 113 from another device ) as well as at least a processor , a main memory , mass storage , and software for executing instructions capable of operating the server device 110 consistent with the invention as further described herein . in one embodiment , the server device 110 includes at least a portion that is either physically , functionally , or logically remote from the local library 120 . in one embodiment , the server device 110 is capable of downloading digital content 113 , as described in the incorporated disclosure , in a cryptographically secure manner , also as described in the incorporated disclosure . the media object database 111 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least the following information . information ilia describing metadata associated with media objects , such as for example — a set of titles , actors , directors , genres , producers , ratings ( e . g ., motion picture ratings for sex or violence ), release dates , remakes , sequels or prequels , series ( e . g ., ordering in a sequence of motion pictures of television episodes ), or other and further associated works . information 111 b describing the media object itself , such as for example a set of digital content comprising the media object or elements thereof . information 111 c describing preferences expressed by other users or groups of users , such as for example a set of awards , collaborative preference information , recommendations or reviews ( either by designated experts or friends ), or other and further preference information about the media objects . information 111 d not specifically related to media objects , such as for example , in a more generalized database , a set of access control information , access frequency , recently of access or alteration , or other and further information not specific to media streams . information 111 a describing metadata includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least information specific to a particular media stream , group of media streams , or other databases or information . this information might include both information intrinsic to a media stream ( such as for example actors , aspect ratio , mpaa rating , or running time ) and information extrinsic to the media stream and associated therewith ( such as for example price or availability ). the communication link 112 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . in one embodiment , the communication link 112 includes internet access . more generally , the communication link 112 might include any possible technique for communication , presently known or unknown . digital content 113 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least audio , video , and combinations thereof as used to present sound and images . for example , but without limitation , digital content 113 can represent media streams 111 , such as for example including movies and songs as might be present on physical media such as compact discs , dvds , digital audio tape , and any other types of electronic computer storage devices . a local library 120 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements might include the following information . information 121 a describing metadata associated with media objects , similar to information 111 a described above . information 121 b describing the media object itself , similar to information 111 b described above . information 121 c describing preferences expressed by users of the local library 120 , similar to information 111 c described above . information 121 d not specifically related to media objects , and particular to the local library , similar to information 111 d described above . a client device 130 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least at least one presentation device 131 , at least one input device 132 , a mass storage , and software for executing instructions ( not shown , but understood by one skilled in the art ), as well as at least a processor , main memory , and storage . this software preferably includes communications and control software capable of operating the client device 130 consistent with the invention as further explained herein . the presentation device 131 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least a device capable of presenting information as described above . the presentation device 131 may include a crt ( such as a television or rgb type computer monitor ), flat panel display , a projection display or screen , or other or further types of devices for displaying or presenting information . in one embodiment , the client device 130 and the presentation device 131 are included in separate physical devices ; however , in the context of the invention there is no particular requirement therefor . in alternative embodiments , the client device 130 and the presentation device 131 may be included in one device , or other or further types of systems not described herein . the input device 132 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least a device capable of receiving information , such as for example commands or information . in a preferred embodiment , the input device 132 includes a touch screen . in alternative embodiments , the input device 132 may include any combination of a computer keyboard and computer mouse , track - ball , touch screen , television remote control , or other or further devices not described herein . a user 140 includes elements shown in fig1 , plus possibly other elements as described in the incorporated disclosure . these elements include at least a human user , or a substitute therefore , such as for example a computer program capable of acting on behalf of a human user ( or a group thereof ), or an artificial intelligence capable of expressing preferences similarly to a human user . fig2 shows an illustration of a screen for user editing of collection models in a system for sales of bundled collections excluding those already purchased . in a preferred embodiment the user 140 customizes parameters of the system to make the system more responsive and efficient to their needs . this is not a requirement as the system includes its own set of default values . customizable parameters are stored in the user data 139 and include ; 1 ) collection models 145 , 2 ) payment data , and 3 ) other information . collection models 145 include specific information defining the attributes necessary for a media stream ill to be included in that collection model 145 . the system 100 includes many predefined collection models 145 . new collection models 145 can be created and existing ones can be edited . for example , but without limitation , a collection model 145 could include the following attributes : attributes for collection models 145 are preferably predefined such that they can be correlated with similar information available at the server device 110 . the user 140 may at any time define a new collection model 145 by selecting a set of attributes and grouping them under a title , such as , “ modern action time travel movies .” preferably , the user 140 defines the title and then selects which attributes to include . the selection process in easily accomplished using lists , dropdown menus , dialog boxes , and similar selection techniques known in the art . a collection model 145 includes not only information intrinsic to the media stream 111 , but also to the externally related factors , such as , what price the user 140 is willing to pay and payment type ( visa , american express , etc .). collection models 145 are specifically advantageous where bundled collections of media streams 111 are concerned . the client device 130 is in regular contact with the server device 110 . if a user 140 has defined a collection model 145 that identifies a now available media stream 111 , the media stream 111 can be purchased and delivered to the user 140 such that the overall collection of a user 140 remains up - to - date . for example , a user 140 may have defined a simple collection model 145 as follows : using the collection model 145 above , the system 100 would auto purchase any new release of the “ sopranos ” cable television series and charge it to a visa card . the system would not purchase any special editions of episodes already owned . the system would price compare buying any newly released episodes individually against buying them as a set to determine if buying the set is cheaper even though it may mean duplication of some media streams 111 . the system also includes automatically generated and default collection models 145 and collection models 145 supplied in the system 100 . an example of supplied collection models 145 includes : the system 100 can generate collection models 145 automatically by analyzing user data 139 , digital content 113 , the client database 137 , and digital content metadata 125 . for example , the system may determine that the actor most often found on media streams 111 owned by the user 140 is al pacino . the system can then automatically create a collection model 145 that will alert the user 140 when new movies are released starring al pacino , or the system may suggest to the user 140 the existing movies starring al pacino that the user 140 does not own . trailers or excerpts from such movies can be made available to the user 140 to promote a sale . automatically generated collection models 145 may be saved or discarded by the user 140 . the user 140 may also take a collection model 145 automatically generated by the system 100 and use it as a starting point for creating new collection models 145 . thus , in the previous example , the user 140 could take the al pacino collection model 145 and modify it to include only movies starring al pacino from 1972 through 1984 . collection models 145 may also be shared between a first user 140 and a second user 140 . new collection models 145 may also be available from a vendor individually or as collections . generally , a fee is charged by the vendor for additional vendor - supplied collection models 145 . when more than one user 140 uses the same system , each user 140 may chose to lock their collection models 145 and their portion of the media streams . this allows a user 140 to keep their preferences private and confidential . the number of attributes associated with digital content grows daily . new media streams 111 , crew , cast members , and the like are being created as a part of the entertainment industry . thus , every unit of digital content 113 purchased by a user 140 has the possibility of being an object of a new automatically generated collection model 145 . the user 140 has the ability to adjust a set of options that control automatically generated collection models 145 . these options include ( but are not limited to ) the ability to set field thresholds , field matching values , and field aggregate values . by setting at least some of these values appropriately , the system 100 would not query the user 140 with a question , such as “ you own ( 1 ) movie starring john wayne , would you like to complete your collection by purchasing the other 173 ?” the user 140 could in this case set the threshold to be prompted when the percentage of movies necessary to complete a collection based on a starring movie actor is less than 10 %. thus , the system 100 operates either in some level of a default mode to locate digital content 113 likely to be of interest of the user 140 and either queries the user 140 for purchase instructions or automatically purchases the media streams 111 , or the system 100 operates in a user - customized mode to locate digital content 113 specifically identified by the user 140 to have a high probability of being desired and either queries the user 140 for purchase instructions or automatically purchases the digital content 113 . the user 140 may define their own attributes . attributes may be defined statically or dynamically . for example , but without limitation , a statically defined attribute may include the era that a movie is set in . a derived attribute can include logic that calculates the ratio of male to female actors in a movie or collection of movies . this feature is preferably supported using a user - editable language and / or a set of attributes stored in a library that are user - definable and otherwise editable . the system presents , for example , a set of elements on a screen where the elements represent collections or bundles of objects , such as movies . the system can present the elements differently in response to : whether the objects are offered as part of a collection ; whether the objects are offered at a discount if purchased together ; and the like . the system presents a set of elements on screen with the effect that some elements represent “ bundles ”, that is , collections of objects . the user 140 can select one or more elements and the system performs an action in response to the user &# 39 ; s selection . the action the system performs can be : buy all the objects in the bundles represented by the selected elements without fear of duplication of objects in the bundles or already owned by the user , unless so desired . that is , no object already owned by the user 140 will be in the current set of objects being purchased , unless the user 140 so desires . for example , if a user 140 is buying a collection known as “ prison escape movies ” and is also buying a collection known as “ the steve mcqueen collection ”, the system would not only avoid purchasing movies that the user 140 already owns but would also avoid buying duplicates of titles that are common to both collections . in this case , it is likely that “ the great escape ” would be in both collections . in some cases , certain movies may only be offered as sets and then duplication would be unavoidable . try - and - buy , rent , view an advertisement for , or enjoy another enticement for , all the objects in the bundles represented by the selected elements without fear of duplication of objects in the bundles or already owned by the user 140 , unless so desired . fig3 shows a process flow diagram for sales of bundled collections excluding those already purchased . a method 300 includes a set of flow points and steps . although described serially , these flow points and steps of the method 300 can be performed by separate elements in conjunction or in parallel , whether a synchronously or synchronously , in a pipelined manner , or otherwise . there is no particular requirement that the flow points or steps must be performed in the same order as described , except where explicitly so indicated . at a flow point 310 , the system is ready to process a request 141 . at a step 311 , the client device 130 sends a request 141 to the server device 110 . the request 141 includes information regarding collection models 145 that specifically or generally identify movies or movie types the user 140 is looking for to complete movie collections . at a step 313 , the server device 110 receives the request 141 . at a step 315 , the server device 110 processes the request 141 . since a request 141 can contain many facets of information , the request 141 can be parsed into separate components to be handled at the server device 110 . the availability of specifically identified media stream titles can be searched in the server database 123 as can statically and dynamically identified media streams 111 through the associated digital content metadata 125 . thus if the user 140 has identified criteria that states they always purchase xxx rated movies starring busty bubbles , the mpaa rating and movie star can be gleaned from the digital content metadata 125 . at a step 317 , the server device 110 sends a response 143 to the client device 130 . at a step 319 , the client device 130 receives a response 143 from the server device 110 . the response 143 may require parsing at the client device 130 . the response 143 preferably includes the results of the request 141 . if no new media streams 111 are available that meet the parameters of the request 141 , the response 143 includes a message to the user 140 informing them of this fact . other information may be included , such as identification of media streams 111 that may be of interest to the user 140 , but which did not exactly match a collection model 145 . if new media streams 111 desired by the user 140 have been identified , the system informs the user 140 of such . the user 140 may or may not have asked that the system 100 inform him of the availability before purchasing . the ability of the system 100 to optionally ( at the command of the user 140 ) notify the user 140 of the availability of media streams 111 without automatically purchasing them gives the user 140 additional flexibility in completing their collections . for example , the user 140 may have set up a collection model 145 entitled “ haunted hollow 1 - 2 - 3 .” the user 140 may not have seen the final installment of the trilogy , and even though they liked the first movie , worry it may be as bad as the second installment they just saw and thus may not want the third installment . if the response 143 to the user 140 indicates that one or more movies meet the parameters of a collection model 145 and includes asking the user 140 to give the goahead , an additional step 319 a is required . at step 319 a , the user 140 either desires or declines a purchase . if the user 140 declines , no payment is sent and no purchase transaction is executed . if the user 140 desires to make the purchase , a separate request 141 is sent that includes collection model parameters for the specific media stream 111 in question along with automatic payment criteria . at a step 321 , the client device 130 updates the client database 137 with information contained in the response 143 . if a media stream 111 has been automatically purchased , the client database 137 would be updated to indicate the purchase and the status of the media stream 111 ( for example : purchased & amp ; in - transit , purchased & amp ; available , purchased & amp ; pending release ). an invoice may also be included in the response 143 . in a preferred embodiment , media streams 111 are sent independently of the response 143 . in an alternative embodiment of the invention , media streams 111 are included as part of a response 143 . at a step 323 , the server device 110 sends one or more media streams 111 to the client device 130 . in the case of non - electronically transferable objects , the objects are delivered in a method consistent with the object type , such as by u . s . mail , united parcel service ( ups ), federal express , and the like . at a step 325 , the client device 130 receives the media streams 111 . the media streams 111 are stored on the client mass storage 135 . the client device 130 updates the client database 137 to indicate that the media streams 111 are now present on the client mass storage 135 and available for viewing by the user 140 . at a flow point 327 , a request 141 has been processed . although preferred embodiments are disclosed herein , many variations are possible which remain within the concept , scope , and spirit of the invention . these variations would become clear to those skilled in the art after perusal of this application . for example , the invention is not restricted to media stream collection , but is also applicable to all collectables and objects that may be logically grouped , such as for example lladro , baseball cards , books , postage stamps , coins , toys , computer games , and to presentation of databases and other collections of information , or of user interfaces associated with operating systems or application software . those skilled in the art will recognize , after perusal of this application , that these alternative embodiments are illustrative and in no way limiting .