the present invention provides an insert for a general - purpose carrying bag , wherein the insert is adapted for holding an electronic device such as a computer , that overcomes the limitations of the prior art . in the detailed description that follows , like element numerals have been used to indicate like elements in one or more of the figures . fig1 and 2 show opposite perspective views of a first exemplary embodiment for an insert 100 according to the invention . insert 100 comprises a pair 102 of spaced - apart panels 104 , 106 having major surfaces 108 , 110 substantially parallel to each other so as to define an interior volume 112 for holding a rectangular prism - shaped object , for example , a laptop computer . insert 100 further comprises a base 114 joined to the pair of spaced - apart panels adjacent to lower edges 116 , 118 of each panel . base 114 is provided with at least one tab 120 substantially perpendicular to panel 104 , extending outward from the pair 102 of panels as shown . a second tab 122 may be provided on a side of the pair 102 of panels opposite to tab 120 , also substantially perpendicular to , and extending outward from , the pair of panels . tabs 120 and 122 may be formed integrally with base 114 , or may comprise separate pieces of material ( not shown ) attached to the base or near the base . tabs 120 and 122 serve to stabilize insert 100 inside a central compartment of a general - purpose carrying bag . base 114 may also serve to stabilize the bottom of a carrying bag , so that it may be placed upright on a flat surface without tipping over . accordingly , tabs 120 , 122 may be constructed of a semi - rigid material that is stiff enough to hold its shape and support the insert 100 away from the sidewalls of the carrying bag , without being too stiff or too hard so as to be uncomfortable to carry or unduly heavy . base 114 and panels 104 , 106 may be comprised of similar materials . suitable materials may include , for example , fabric - reinforced paper or cardboard , plastic , leather , heavy fabric , metal , and various laminates or other combinations of the foregoing materials , as known in the art for use with carrying bags and articles of luggage . each tab 120 , 122 preferably extends outward of the panel pair 102 a distance of between about 0 . 25 and 3 inches , depending on the size of carrying bag the insert is designed for . base 114 may be attached to an interior bottom of a carrying bag , such as by stitching or using an adhesive . in the alternative , a lower surface 124 of the base 114 or tabs 120 , 122 , or a portion of the lower surface , may comprise a suitable detachable fastener . or fabric for attaching or improving adhesion between the base 114 and an adjoining bottom panel of a carry bag . for example , a suitable detachable fastener may include hook fabric or loop fabric of a hook - and - loop fastener system , one or more snaps , clips , or hooks , or a tacky coated fabric . panels 104 , 106 may be attached together a distance away from base 114 , so as to maintain the panels in substantially parallel relation . in the illustrated embodiment 100 , connecting bands 126 , 128 are attached to both panels 104 , 106 at opposite sides of the panel pair 102 . bands 126 , 128 may be fastened to panels 104 , 106 using any suitable method , for example , by stitching , rivets , or adhesive . in the alternative , a removable fastening system , such as a clasp , snap , or hook - and - loop fabric may be used . in the illustrated embodiment , the sides of the panel pair 102 are left open between bands 126 , 128 and base 114 . advantageously , leaving the sides open permits the interior volume 112 to be readily cleared of debris or small articles prior to insertion of a larger object such as a laptop computer . in the alternative , but less preferably , the sides of the pair 102 may be closed using a side panel of fabric or other suitable material . insert 100 may further be provided with a lifting strap 130 , an upper portion 132 of which may also function as a closure for the upper end of the panel pair 102 . as such , the upper portion 132 may be provided with a suitable fastener for use in closing the interior volume of the insert . in the illustrated embodiment , a piece of loop fabric 134 is attached to the upper portion 132 , for removable attachment to a corresponding piece of hook fabric 136 attached adjacent to an upper edge of panel 106 . other suitable fasteners , for example , hooks , clasps , snaps , or buttons may also be used instead of hook - and - loop fabrics 134 , 136 . operation of the upper portion 132 as a closure should be apparent from inspection of fig1 and 2 . the lifting strap 130 may also perform the function of lifting a relatively heavy object , such as a laptop computer , out of the interior volume 112 . to this end , the upper portion 132 may be threaded from the interior volume 112 to the exterior of the panel pair 102 through a guide slot 140 , so as to function as a pull tab for a lower portion of the lifting strap . although not visible in fig1 and 2 , because it is obscured by panels 104 , 106 , the lower portion of the lifting strap may be wider than the end portion 132 so as to better lift an object contained in the interior volume of the insert . in general , strap 130 may be constructed of material similar to panels 104 , 106 , but preferably thinner and more flexible to facilitate pulling through slot 140 and flexure in the interior volume around an object to be lifted . for example , leather , fabric , plastics , and laminates or composites thereof may be suitable . further details of the lifting strap are described below in connection with fig5 and 6 . fig3 and 4 show a second embodiment of an insert 200 . insert 200 may be constructed essentially similar to insert 100 , except for having a different orientation of the panel pair 202 . many laptop computers comprise rectangular prism - shaped objects , having two long edges and two short edges . insert 200 is configured to hold a rectangular prism - shaped object of the same size as insert 100 , except insert 200 is designed to accommodate long edges of a rectangular prism parallel with the base and top edges of the insert . in comparison , insert 100 is designed to hold the same object with the short edges parallel to the base 114 and upper end . either insert 100 or insert 200 may be used to carry the same object , depending on the desired style of carrying bag . it should further be apparent that inserts similar to inserts 100 or 200 may be provided in different sizes , to hold smaller or larger objects . fig5 and 6 show cross sectional views of an exemplary insert 300 similar to inserts 100 and 200 , inside of a compartment 350 of an exemplary carrying bag 352 . bag 352 may comprise additional components and details ( not shown ) as known in the art . insert 300 may be inserted in compartment 350 , with the base disposed and attached against a bottom side of the compartment . tabs 320 , 322 extend away from the side panels of insert 300 , to stabilize the insert in a central portion of the compartment and thereby divide the compartment into two spaces 356 , 358 on opposite sides of insert 300 . a rectangular prism - shaped object 354 , representing a laptop computer , is inserted into an interior volume of insert 100 . insert 300 comprises a lifting strap 330 having an upper portion 332 and a lower portion 338 . the upper portion 332 is threaded through a guide slot 340 in a first side panel of insert 300 , and the lower portion is attached to the opposite side panel about one - fifth to one - quarter of the panel length away from the base . fig5 shows the object 354 fully inserted into insert 300 , pushing the lower portion 338 of the lifting strap to base 314 . from this position , pulling on the upper portion 332 will partially lift object 354 out of insert 300 , as shown in fig6 . this may enable easier removal of the object 354 from the insert , while lessening any tendency to remove the insert itself from the compartment . optionally , the entire insert 300 may also be removed from the compartment 350 , such as when it is desired to use the carrying bad for some other purpose . having thus described a preferred embodiment of the computer holding insert for a carrying bag , it should be apparent to those skilled in the art that certain advantages of the within system have been achieved . it should also be appreciated that various modifications , adaptations , and alternative embodiments thereof may be made within the scope and spirit of the present invention . for example , an insert using hook - and - loop fasteners has been illustrated , but it should be apparent that the inventive concepts described above would be equally applicable to inserts with other types of fasteners ,. including snaps , clips , or buttons . the invention is further defined by the following claims .